What is the best interpretation of the y-intercept of the line?

Option 1: $30 an hour plus a nonrefundable deposit of $50 option 2: $20 an hour plus a nonrefundable deposit of $75 kyle is renting a jetski for the day. if he can rent the jetski in one hour increments, what is the minimum number of hours must he rent the jetski for option 2 to be a better deal then option 1?

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

F(x)= 4x g(x) =x-1 what is f(x) divided by g(x)