please do 5-8 separately from number 9

For each pair of variables, tell which one should be the explanatory variable and which should be the response variable. What kind of association would you expect to see? 5. Gasoline: number of miles driven since filling up, amount of gasoline remaining in tank. 6. College freshmen: shoe size, grade point average. 7. A streetlight: the brightness it appears to you, your distance from the light. 8. Apples: circumference, weight. Scatter Plots 9. Match the correlation coefficient (r) with each scatter plot. -0.977: -0.021: 0.736: 0.951