Is there a relationship between the percent of high school graduates in each state who took the SAT and the state’s mean SAT Math score? Here is a residual plot from a linear regression analysis that used data from all 50 states in a recent year Explain how the residual plot shows that the Linear condition for performing inference about the slope is, or is not, met.

a. The variability of the residuals in the vertical direction is roughly the same from the smallest to the largest -value, which suggests that the relationship between mean SAT score and percent taking is not linear.

b. There is clear curvature in the residual plot, which confirms that the relationship between mean SAT score and percent taking is linear.

c. There is clear curvature in the residual plot, which suggests that the relationship between mean SAT score and percent taking is not linear.

d. There is clear curvature in the residual plot, which suggests that the relationship between mean SAT score and residual values is not linear.

e. The variability of the residuals in the vertical direction is roughly the same from the smallest to the largest -value, which confirms that the relationship between mean SAT score and percent taking is linear.