Find the average rate of change of the function f(x) = x- + 7x from x, = 3 to x, =6. The average rate of change is (Simplify your answer.)O Points: 0 of 1 Save Watch the video and then solve the problem given below. Click here to watch the video. 60- The graph on the right shows the remaining life expectancy, E, in years for females of age x. (40 40.) 40 Life Expectancy in years Find the average rate of change between the ages of 50 and 60. Describe what the average rate of change means in this situation. (50 30.8) (60 21.6 ) 20- (70 13.9) 20 40 60 80 The average rate of change of life expectancy between the ages of 50 and 60 is (Type an integer or a decimal.)O The graph on the right shows the remaining life expectancy, E, in years 60- for females of age x. (40 42 7) Find the average rate of change 40- (50 33.B) Life Expectancy in years between the ages of 50 and 60. (60 24.6) Describe what the average rate of 20- (70 17 4) change means in this situation. X 0 20 40 60 80 The average rate of change of life expectancy between the ages of 50 and 60 is (Type an integer or a decimal.)