The function a(b) relates the area of a trapezoid with a given height of 12 and one base length of 9 with the length of its other base. It takes as input the other base value, and returns as output the area of the trapezoid. am) = 12 +9 2 Which equation below represents the inverse function b(a), which takes the trapezoid's area as input and returns as output the length of the other base? O A. bla) = O B. D(A) = + 9 O c. bla) = 5+6 ( O D. b(a) 8-9​