Making Predictions

Question 1

Which two structures produce energy that cells can use?

Revolt · Accepted Answer

A and B; D and A

Question 2

To lose 5 pounds a month, a person should plan to be active for hours a week.

Revolt · Accepted Answer

3.6

Question 3

Use the trend line for the data in the scatterplot to make a prediction. About how many pounds were lost per month with 4 hours of weekly aerobic activity?

Revolt · Accepted Answer

6 pounds

Question 4

A person who is active for 8 hours weekly could expect to lose pounds a month.

Revolt · Accepted Answer

10.2; Selection 1: 10.2; Selection 2: 3.6

Question 5

Compare and contrast interpolations and extrapolations based on a scatterplot.

Revolt · Accepted Answer

Interpolations and extrapolations are both methods used to make predictions based on a scatterplot's line of best fit. An interpolation is a prediction that lies within the range of the existing data points (the cluster), while an extrapolation is a prediction for a value that lies outside the range of the observed data. Consequently, interpolations are considered more reliable, whereas extrapolations carry more risk because they assume that the observed trend will continue indefinitely.

Question 6

Kardal used the trend line to predict that a man 72 inches tall would wear about a size 10.5 shoe. What can be concluded about this prediction? Check all that apply.

Revolt · Accepted Answer

The prediction is an interpolation.; No data is given in the scatterplot for a height of 72 inches, but a shoe size can still be predicted.

Question 7

What is the approximate height of a man who wears a size 7 shoe? Round to the nearest whole number. inches

Revolt · Accepted Answer

64

Question 8

Ramona determined that her answer was incorrect because a man who is –17.52 inches tall does not make any sense. What was Ramona’s mistake?

Revolt · Accepted Answer

She substituted the 8.5 for the wrong variable.

Question 9

Explain how to use the regression calculator to make a reasonable prediction given a data table.

Revolt · Accepted Answer

To use a regression calculator for predictions, first identify the independent (x) and dependent (y) variables in the data table. Enter the data pairs into the calculator to generate the regression equation. Then, substitute a known value into this equation and simplify to calculate the predicted value for the other variable.

Question 10

Which did your explanation include? Check all that apply.

Revolt · Accepted Answer

An interpolation is more reliable than an extrapolation.; An interpolation is based on data within the range of data for the scatterplot.; An extrapolation is based on data outside the range of data for the scatterplot.

Making Predictions Answers

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