Question

Solve the following word problems. You have a coupon for $50 off your camera purchase of $100 or more at Zeke's Camera World. Write a function relating a cameras purchase price after coupon,y,to the retail price,x.. Give the domain of this function. And if you use the coupon in problem 17, what is the minimum your camera purchase will cost (before tax)

Answer 1

given the problem, seems like we don't need a variable (of number of cameras purchase)

y = total price after discount
x = total retail price (before discount)

y = x - 50 (because the coupon - 50$ off the total price)
x >= 100 (in order for the coupon to work, x has to equal or larger than 100$)