55 points and brainliest What is the equation of the function that is graphed as line a?

y = 2 x - 1
y = - x - 1
y = - x
y = 3 x

If f(x) and g(x) are inverse functions of each other, which of the following shows the graph of f(g(x)

The longer leg of a 30-60-90 trangle is 18

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?