Suppose yogurt is on sale for $0.75 each, and you have a coupon for $0.50 off your total purchase. Write a function rule for the cost of x yogurts.
The function rule for the cost of x yogurts can be written as:
Cost(x) = x * (0.75 - 0.50) = x * 0.25
So, the cost of x yogurts can be found by multiplying the number of yogurts (x) by $0.25.