Base your answer to the following question on The vertices of triangle ABC are A(1,2), B(3,8), and C(5,-2)
Prove that ABC is a right triangle.

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?