At Joe's pizzeria a pizza costs $5 with the first topping, and then an additional 75 cents for each additional topping.

If represents the number of toppings on a pizza, what function represents the cost of a pizza with at least one topping?

At Joe's pizzeria a pizza costs $5 with the first topping, and then an additional 75 cents for each additional topping.

If represents the number of toppings on a pizza, what function represents the cost of a pizza with at least one topping?