You have a coupon for $50 off your camera purchase of $100 or more at Zeke's Camera World. Write a function relating a camera's purchase price, y, to the retail price, x. Give the domain of this function.
y = x - 50 for x>=100
To write the function relating the camera purchase price, y, to the retail price, x, we can use the following equation:
y = x - 50
In this equation, y represents the camera's purchase price, and x represents the retail price. The coupon for $50 off is used by subtracting it from the retail price.
The domain of this function is the set of all possible retail prices, x, where the purchase price, y, will be defined. In this case, since the coupon is applicable for purchases of $100 or more, the retail price, x, must be greater than or equal to $100.
Therefore, the domain of this function is x ≥ 100.