John is going to the amusement park, where he has to pay a set price of admission and another price for tickets to go on each of the rides. The total amount of money y John will spend is given by the equation - 18+ 1.5, where represents the total amount of money, in dollars and cents, and at represents the number of rides John goes on. What could the number 1.5 represent in the equation? The total amount of money John will spend if he goes on o rides. The change in the total amount of money for every one additional ride he goes on. The total amount of money John will spend if he goes on a ride. The total amount of money John will spend if he goes on 100 rides.