This figure shows an estimated linear equation along with its 95% prediction intervals. Assume that  counts customers and  measures dollars. (a) Visually estimate the intercept  and the slope . (b) Is...

This figure shows an estimated linear equation along with its 95% prediction intervals. Assume that
 counts customers and
 measures dollars.

(a) Visually estimate the intercept
 and the slope
.

(b) Is se less than 3, about 3, or more than 3?

(c) Is the value of
 approximately equal to 0.2, 0.5, or 0.8?

(d) Estimate
, the standard deviation of the residuals.