SAT Problem Solving & Data Analysis 4

Question 1

A scatterplot shows a strong positive linear association. As x increases, y tends to:

Accepted Answer

Increase

Answer

A positive association means y increases as x increases.

Question 2

A line of best fit is y = 2x + 3. What is the predicted y when x = 5?

Accepted Answer

13

Answer

y = 2(5) + 3 = 10 + 3 = 13.

Question 3

In the model y = 2x + 3, what does the slope of 2 represent?

Accepted Answer

The change in y per unit increase in x

Answer

Slope is the rate of change of y for each one-unit increase in x.

Question 4

A correlation coefficient of r = -0.95 indicates:

Accepted Answer

A strong negative linear relationship

Answer

An r value close to −1 indicates a strong negative linear relationship.

Question 5

Which type of model best fits data that doubles at a constant percentage rate?

Accepted Answer

Exponential

Answer

Constant percentage growth is modeled by an exponential function.

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