Plz answer this question fast

A. the x-intercepts represent break-even points, depending on the price of an eraser x. the maximum at (4, 270) means that maximum profit of 270 is received at the price of 4. this quadratic function is increasing from 0 to 4, and decreasing from 4 to 8. sales increase as the price is lowered, and the overall profit increases from 0 to 4 and decreases from 4 to 8.b. the equation of the parabola is y = a(x - 4)^2 + 270. substituting x = 0, y = 0 gives a = -135/8, so the equation is y = -135/8 (x - 4)^2 + 270. substituting x = 1 gives y = 118.125. then the average rate of change from x = 1 to x = 4 is: m = (y2 - y1) / (x2 - x1) = (270 - 118.125) / (4 - 1) = 50.625.this is the average rate at which profit increases as price is adjusted between $1 to $4/eraser.