A single point in each of the three plots below is highlighted with an * symbol. Each scatterplot shows the least squares regression estimated without this point. a. Indicate whether the marked point...

A single point in each of the three plots below is highlighted with an * symbol. Each scatterplot shows the least squares regression estimated without this point.

a. Indicate whether the marked point is leveraged in each case.⁴

b. Will the r 2 of the regression increase, decrease, or stay about the same if the marked point is added to a regression?⁵

c. How will adding the marked point to the regression affect the estimated slope and intercept?⁶