Aquatic World (AW) charges $6 admission plus $1 for each ride. The cost at Surf World (SW) is $2 Admission plus $2 per ride. Let x = the number of rides, let y = the total cost

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.