1. fun times amusement park charges a $7 admission fee plus $1.75 per ride

a: write an equation in intercept form for clculating the total cost, C, of going to the park and riding r rides

b: graph your equation from 1a. How are the $7 admission fee and the $1.75 cost per ride shown in the graph

c: Nicole goes to the park with $21. How many rides can she go on?