You have to use R to for this exercise. [In your R document, type comments (lines that start with #) to both (i) explain what your commands do, and (ii) answer questions in the problem below.]

Sal 420 420 es Pri 320 ce a. Estimate the linear regression of sales on price using /m() and report the coefficients of the regression. b. Graph the data and the regression line together using plot() and abline(). c. What effect would you expect a $30 increase in price to have on sales