X= -4 y=3 Pls solve the equation.

Which of the following is the graph of y= square root -x-3

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?

If x varies directly as y, and x = 7.5 when y = 10, find x when y = 4