Two Variable Data Practice

We wish to investigate the relationship between the time spent shopping and the number of items bought. The response variable (RV) is

• The number of items bought

• The number of items at the shop

• The time spent shopping

• The time spent getting to the shops

Tags

CCSS.6.EE.C.9

Which scatter plot shows a negative relationship?

• Graph A
• Graph B
• Graph C
• Graph D

Tags

CCSS.8.EE.B.5

Describe the association of the scatter plot.

• There is a strong, positive, linear association.

• There is a strong, negative, linear association.

• There is a strong, positive, nonlinear association.

• There is a strong, negative, nonlinear association.

Tags

CCSS.8.F.A.3

Give the coordinates of the influential point and provide an explanation why you chose it.

• (8,1) If we remove this point, the slope of the line will dramatically decrease.

• (8,1) If we remove this point, the slope of the line will dramatically increase.

• (1,0) If we remove this point, the slope of the line will dramatically decrease.

• (1,0) If we remove this point, the slope will dramatically increase.

Choose the correlation coefficient (r-value) that best matches the scatterplot.

• - 2.0

• - 0.6

• 0.65

• 0.95

When the influential point (point A) is removed, what will happen to the slope of the regression line?

• The slope will increase.

• The slope will decrease.

• The slope won't change.

• The slope disappears.

Which of the scatterplots can best be modelled by a regression line? (Check all that apply.)

• A

• B

• C

• D

Choose the correlation coefficient (r-value) that best matches the scatterplot.

• - 2.0

• - 0.6

• 0.65

• 0.95

When the influential point (point A) is removed, what will happen to the slope of the regression line?

• The slope will increase.

• The slope will decrease.

• The slope won't change.

• The slope disappears.

• 164.5

• 74.5

• 15.5

• 15