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TI-84+C/CE Scavenger Hunt Before you begin: Be sure the calculator is set to default mode, as shown at the right. Press the MODE key and be sure all entries are highlighted on the left. If not, use your arrow keys to move to the left and press ENTER to highlight, as you arrow down the screen. Now, answer the following questions. 1. Which numbered choice shows the keystrokes used to find the calculator’s individual ID number? 1) yÃÀ 2) yÃÁ 3) y÷ 4) yì Record your calculator’s ID number here. 2. Press the key pattern y} five times in a row, then press the key pattern y† five times in a row. Which numbered choice best explains what is happening? 1) The print size on the screen gets larger then smaller. 2) The screen contrast gets darker then lighter. 3) The screen display size gets larger then smaller. 4) The calculator turns off then back on. 3. Press o. You have now left the “Home Screen” work area of the calculator. Which numbered choice shows the keystroke(s) that will return you to the “Home Screen”? 1) ‘ 2) y» 3)Y z 4) { 4. Press 10.2345 ¯ 20.465 Í . Which numbered choice shows the keystrokes that will return this multiplication problem to the screen without retyping? 1) yÌ 2) yÍ 3) y{ 4) yŒ 5. Type in 1234567899 and press Í. Then type in 12345678999 and press Í. Which numbered choice shows your answers (in order)? 1) 1234567899 and 12345678999 2) 1234567899 and 1.2345678E10 3) 1234567899 and 1.2345679E10 4) 1.2345679E9 and 1.2345679E10 6. You have been playing games on your calculator and everything appears to be messed up now that you are in math class. You need to reset the calculator back to its default settings. Which numbered choice will reset the calculator to its default settings? 1) yìÁÁ 2) ‘ 3) y z 4) yÃÂÍ
7. Because of the extensive number of menus on the calculator, it can often be difficult to remember where to find an item. When this happens, look for the item in the CATALOG, where items are listed in alphabetic order. Which numbered choice will open the CATALOG? 1) yÃÁ¶ 2) yÃÀ 3) yÊ 4) There is no catalog. 8. Which numbered choice shows the keystrokes used to “square” a value, such as 152? 1) À·¡Í 3) À·¯À·Í
2) À·›ÁÍ 4) All of the above.
9. To convert a decimal number to a fraction, enter the decimal, hit the » key, and choose option #1. Which numbered choice shows the result of the calculator converting 0.68 to a fraction? 68 34 1) 100 2) 50 3)
17 25
4)
8.5
12.5
10. Which numbered choice shows two expressions that yield the same result on the calculator when each expression is entered exactly as written below? 1) -42 and (-4)2 are the same. 2) (8 – 6)/(2 + 1) and 8 – 6 / 2 + 1 are the same 3) 3 + 5 – 2 * 6 and (3 + 5 – 2) * 6 are the same 4) 10 * 3 / 5 and 10(3) / 5 are the same 11. Type in 8.6489 and press Í. Press z and change the FLOAT setting to “2” (as shown at the right). Return to the “Home Screen”. Type in 8.6489 again and press Í. Which numbered choice describes what has occurred by resetting the FLOAT? 1) The answer now shows only two decimal places, 8.64. 2) The answer is now rounded to two decimal places, 8.65. 3) The answer now shows two numerical entries, 8.6. 4) The decimal is now moved two places, 864.89. 12. Change the FLOAT setting to “0”. Type in 10.572 and press Í. Which numbered choice describes what happens? 1) The decimal values in the problem are cut off. 2) The problem is rounded to the nearest tens position. 3) Zero is added to the problem. 4) The problem is rounded to the nearest integer. Before you continue: Be sure the calculator is set to default mode, as shown at the right. Press the MODE key and be sure all entries are highlighted on the left. If not, use your arrow keys to move to the left and press ENTER to highlight, as you arrow down the screen.
13. Which numbered choice represents the keystrokes that will place a on the screen? 1) yÊ}} to 2) y› 3) »~ 4) Both 1 and 2 yield 14. Using your calculator, find the area of a circle whose radius is 12 inches. Round the answer to the nearest hundredth. Which numbered choice is the answer? 1) 1809.56 2) 452.39 3) 113.10 4) 75.40 15. To evaluate an expression, such as x2 – 5x + 2, when x = 5, type the expression on the home screen replacing x with 5. Or, store 5 in the variable x by pressing ·¿„ and then enter the expression in terms of x. (Use the „key each time you need an x.) Which numbered choice is the answer when 3x3 – 4x2 + 5x – 12 is evaluated for x = 8? 1) -36 2) -8 3) 654 4) 1308 16. The calculator can be used to check your algebraic multiplying or factoring skills. The screen at the right shows (x – 6)2 being checked with two possible answers. The 0 indicates that the first answer is “false” and the 1 indicates that the second answer is “true”. To get the = sign, press y»À. Which numbered choice below shows a false statement? 1) (x + 2)(x – 2) = x2 – 4 2) (x – 4)(x + 8) = x2 – 4x – 32 3) (x + 3) 2 = x2 + 6x + 9 4) (x – 12) 2 = x2 – 24x + 144 17. The symbol for absolute value can be found in the CATALOG: yÊ abs( or under » , arrow right to NUM, À abs( . Which numbered choice is equivalent to |-49 – (-17)|? 1) -32 2) 32 3) -66 4) 66 18. Inequalities such as 3x + 1 ≤ -2 can be entered on the calculator under o. The “≤” can be found under y»¸. When s is pressed, the solution is shown to be x ≤ -1. The TABLE (y s) shows “1” for values that make the inequality true, and “0” for those that will be false. Which numbered choice shows the correct solution to the inequality 4x + 1 ≥ -7? 3 3 1) 𝑥 ≥ 2 2) 𝑥 ≥ − 2 3) 𝑥 ≥ −2 4) 𝑥≥2
19. Press o . Which numbered choice shows the maximum number of functions that can be entered on this screen? 1) 7 2) 8 3) 9 4) 10 20. Enter 3x + 6 under Y1. Press s . Press r. Which numbered choice is the location of the blinking “spider” on the screen when r is first pressed? 1) On the x-axis 2) In quadrant I 3) On the y-axis 4) In quadrant II 21. Press q¸ . Press p. Which numbered choice shows the maximum x-value seen on the graphing screen under a “ZStandard” zoom? 1) 5 2) 10 3) 15 4) 20 22. With Y1 = 2x + 6, enter -2x + 2 into Y2. Press s. To find the intersection point of these two lines, press y r, arrow down to #5. Move the spider near the intersection point and press Í three times as you select the first equation, second equation, and guess. Which numbered choice is the intersection point? 1) (-1, 4) 2) (4, -1) 3) (1, 4) 4) (4, 1) 23. Both equations in Y1 and Y2 are now “active”, they both appear when graphed. Turn “off” the Y 2 function by moving over the = sign and pressing Í. Press s. To find the exact point where this function crosses the x-axis, press y r, choose #2. Move the spider to the left of the point to choose a minimum and press Í. Move the spider to the right of the point to choose a maximum and press Í. Press Í again choosing a guess. Which numbered choice shows the coordinates of the location of the function crossing the x-axis? 1) (0, -2) 2) (-3, 0) 3) (-4, 0) 4) (-2, 0) 24. Clear both entries in Y1 and Y2 before continuing. Move your cursor over each equation and press ‘. “Intersection” can be used to solve equations such as 4x – 4 = 0.5x + 3. Type 4x – 4 into Y1 and 0.5x + 3 into Y2. Press s. The solution to the equation will be the x-coordinate of the point where the lines intersect. Use the calculator’s intersect option (as seen in question #22) to find the solution to the equation. Which numbered choice is the equation’s solution? 1) X = 2 2) X = 4 3) X = -2 4) X = -4 25. Data: 24, 26, 28, 23, 25, 32, 28, 40 Enter the data into the calculator lists. To do so, press … , choose #1, enter the data into the first column, L1. Go to the home screen. To find the median of the data, press y… , arrow right to MATH, choose #4, yÀ¤ . Which numbered choice is the median of this data? 1) 24 2) 25 3) 27 4) 28
26. Before continuing, you need to clear L1. You can press { for every entry, or you can arrow up onto L1 and press ‘Í . The list will be empty after you arrow down. Clear L1 and also clear any entries in o. Enter hours of study in L1: 6, 8, 10, 12, 9, 14, 16. Enter test score s in L2: 65, 78, 80, 94, 85, 95, 98. To prepare a scatter plot, press y o, choose #1, highlight the screen as shown. Press q , #9. Which numbered graph is the scatter plot for this data?
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27. Before continuing, you need to turn off your scatterplot. Press o. Notice that Plot1 at the top of the screen is highlighted. Arrow up and press Í on Plot1 so that it is no longer selected. Return to the home screen. Which numbered choice shows the calculator’s response when you try to divide by zero? 1) ERROR: DIVISION 2) ERROR: SYNTAX 3) ERROR: DIVIDE BY 0 4) ERROR: QUOTIENT 28. Which numbered choice shows the calculator’s response when you type in 16-5 using the negative symbol instead of the subtraction sign? 1) ERROR: NEGATION 2) ERROR: SYNTAX 3) ERROR: SUBTRACT 4) ERROR: SIGN 29. Under p , enter the values shown at the right. Which numbered choice shows the calculator’s response when you press s? 1) ERROR: SYNTAX 2) ERROR: ORDER 3) ERROR: WINDOW RANGE 4) ERROR: DOMAIN 30. On the home screen, you type the square root of negative five. Which numbered choice shows the calculator’s response when you press Í? 1) ERROR: SIGN 2) ERROR: NONREAL ANSWERS 3) ERROR: PARAMETER 4) ERROR: SYNTAX 31. When an error message appears, it is always best to choose option 2:Goto, as the calculator will attempt to point to the error. Enter the following exactly as written and press Í: (16 – 7)/2 + 4) + 6 When the error occurs, choose option 2. Which numbered choice describes the error the calculator is trying to point out? 1) Division by zero is going to occur. 2) The division sign should be subtraction. 3) A right parenthesis is missing its left counterpart. 4) The numbers are not listed in proper order.
31. Enter 4 / (9 – (6 + 3) ) Which numbered choice describes the error with this entry? 1) There are too many sets of parentheses. 2) There are insufficient parentheses. 3) The numerator should be a larger value. 4) Division by zero is going to occur.
