Bzzzzt....
Slope is bad. You MUST use the x-values and y-values in the same order. Your sign is wrong.
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 =