1 · MATH-5B-C12-REVIEW-Q01
Four data collectors record [18, 20, 22, 24]. Find the mean and explain what fair redistribution means.
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Answer: 21
Total 84 shared equally among 4 yields 21.
Great Inheritance Mathematics Term B · Original independent course
Chapter 12 Review
Formative chapter review. Work independently, then reveal the feedback.
Original assessment
2 · MATH-5B-C12-REVIEW-Q02
A claimed mean of 22 is given for [18, 20, 22, 24]. Use a total check to test the claim.
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Answer: Incorrect; 21
4 × 22 is not the actual total 84.
3 · MATH-5B-C12-REVIEW-Q03
Four readings should average 28, but three are [19, 21, 23]. Find the missing reading.
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Answer: 49
Target total is 112; subtract known subtotal 63.
4 · MATH-5B-C12-REVIEW-Q04
The four-readings mean is 28, and the fourth reading is 49. Find the sum of the first three.
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Answer: 63
28 × 4 − 49 = 63.
5 · MATH-5B-C12-REVIEW-Q05
Use one × per observation to draw a line plot of [5, 5, 6, 6, 6, 7]. State the mode.
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Answer: 6 (3 occurrences)
Plot 2 marks at 5, 3 marks at 6, 1 mark at 7.
6 · MATH-5B-C12-REVIEW-Q06
A plot of the six values [5, 5, 6, 6, 6, 7] has only five × marks. What correction must be made?
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Answer: Add the missing sixth mark
One mark per observation, six total.
7 · MATH-5B-C12-REVIEW-Q07
Plot point P at (18, 20) on a first-quadrant grid; describe each movement from the origin.
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Answer: P=(18, 20)
Move 18 on horizontal x, then 20 on vertical y.
8 · MATH-5B-C12-REVIEW-Q08
A student plots (18, 20) by moving 20 right and 18 up. Explain the location error and correct it.
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Answer: (18, 20)
Ordered pairs are (horizontal x, vertical y); movements were swapped.
9 · MATH-5B-C12-REVIEW-Q09
A constant-rate graph shows (0,0), (1,5), (2,10). Assuming the same rate through x=6, find its unit rate and y-value.
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Answer: rate 5; y=30
Slope is 5 per x-unit; y=5×6.
10 · MATH-5B-C12-REVIEW-Q10
A constant-rate line has y=30 at x=6. What is y at x=1?
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Answer: 5
30 ÷ 6 = 5.