Find the slope of the line that passes through points (7,-5) and (-1,-3).
a.) 4.
b.) 1/4
c.) -4
d.) -1/4

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?