What is the value of exterior angle?

Which graph shows a function with a range of all real numbers greater than or equal to -1

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =

Astudent draws two parabolas both parabolas cross the x axis at (-4,0) and (6,0) the y intercept of the first parabolas is (0,-12). the y intercept of the second parabola is (0,-24) what is the positive difference between the a values for the two functions that describe the parabolas