CAN SOMEONE FIND THE ROC AND THE SLOPE AND Y-INTERCEPT?!

Guests at an amusement park must be at least 54 inches tall to be able to ride the roller coaster. which graph represents the set of heights that satisfy this requirement?

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=