make a linear equation

Question

A community bird-watching society makes and sells simple bird feeders to raise money for its conservation activities. They sell 32 per week at a price of $10 each. They are considering raising the price, and they find that for every dollar increase, they lose four sales per week.
(a) Find a linear equation that models the number y of feeders that they sell each week at price x.

Answer 1

x = price

x - 10 = price increase

4(x - 10) = lost sales

 

y = 32 - 4(x - 10)