Linear Association with R Value

Which value of r represents data with a strong negative linear correlation between two variables?

• -0.86

• -0.50

• 0.89

• 0.07

Which scatter plot shows a linear relationship between x and y?

• Graph A

• Graph B

• Graph C

• Graph D

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

Describe the correlation in the graph shown.

• Strong Negative

• Strong Positive

• Weak Negative

• Weak Positive

• r=.99

• r=.98

• r=20.7

• r=-35

The data relates the average temperature in a month (in ˚F) to the heating bill (in dollars) at Claire’s house that month.

(38,93), (42,79), (44,75), (36,83), (42,74), (49,67), (38,86)

What is the r-value for a linear model?

• 0.87

• 0.23

• 0.5

• 1

Using the same data from the last question, what is the correlation coefficient (r)?

• -0.66

• 2.25

• 0.99

• -0.99

A person travels by car.  They record their miles driven in a data table.  State the correlation coefficient, round to the nearest hundredth, if necessary.

Mathematical Equivalence

ON

• 12

• 13

• 14

• 18

Find the correlation coefficient (3 sig fgis)