Going to the movies costs 9.50 per person. what is the slope of the line that models this situation, if x represents number of people and y represents total cost

 the cost is proportional to the number of people because a constant value 9.50 exists where each measure of the number of people multiplied by this constant gives the corresponding measure in y

J= r + 9 because since jessica rode 9 more miles than roger, you add 9 miles to rogers mileage.