Scatter Plots Practice

What happens to sales as temperatures increase?

• Sales decrease.

• Sales do not change.

• Sales increase.

Is the relationship LINEAR or NONLINEAR?

• Linear

• Nonlinear

Answer explanation

It forms a straight line, which means it it shows a linear relationship with a constant rate of change.

Are there any outliers?

• Yes, (45, 8).

• Yes, (40, 1).

• No.

Answer explanation

(45, 8) is an outlier because the point goes against the general negative pattern formed by the rest of the data.

Most students missed fewer questions the more they studied. However, this student studied a lot and missed a lot of questions.

Which scatter plot has the highest correlation coefficient?

• A

• B

• C

• D

The coefficient of determination describes

• the direction of a scatter plot

• how well a model fits a scatter plot

Which scatter plot most likely has an correlation coefficient of -0.29?

• A

• B

• C

• D

Which model will have the highest coefficient of determination?

• A

• B

• C

• D

Which model will have the lowest coefficient of determination?

• A

• B

• C

• D

The correlation coefficient describes

• the direction of a scatter plot

• how well a model fits a scatter plot

You are analyzing a scatter plot that has a negative correlation. What is true of the of the x and y values?

• As x increases, y decreases

• As x increases, y increases

• As x decreases, y decreases