Let f be the function defined by f (a) = sec a + csc . Which of the following expressions is the average rate of change of f over the interval , ? A f ( ) +$ ( = ) 2 f ( ) +$ (= ) B + + C f ( 3x ) -f ( =) 8 D f ( 3 ) - f ( # )-3 -1 1 Co 12 0 1 -4 Selected values of a function g are shown in the table above. What is the average rate of change of g over the interval [-3, 3] ? 3-(-3) A (-4)-12 B (-4)-12 3-(-3) C 12+(-4) 2 D 12+0+1+(-4) 4Let f be the function defined by f(a) = e2. The average rate of change of f over the interval [1, b] is 20, where b > 1. Which of the following is an equation that could be used to find the value of b ? A f (b) = 20 B f (b ) - f (1) = 20 c f (b)-f(1) b-1 = 20 D f (b) +f(1) 2 = 20Let f be the function defined by f (a) = 2 - x. Which of the following expressions is the average rate of change of f on the interval [1, 3] ? A f(3) +f(1) 2 B f(3) +f(1) 3+1 C f(3)-f(1) 3-1 D f (3) - f (1)