a. Suppose that a market research company finds that at a price of p = $20, they would sell x = 62 tiles each month. If they lower the price to p = $10, then more people would purchase the tile, and they can expect to sell x = 72 tiles in a month’s time. Find the equation of the line for the demand equation. Write your answer in the form p = mx + b.

This is what I have so far:

First Point:

(20, 62)

Second Point:

(10,72)

Find the slope:

m = (62-72)/(10-20) = -1

What I need help on is:

Find the equation of the line:

p-p1=m(x-x1)

Solve the equation in terms of p:

p =