26. Determine the average rate of change of the function over the domain graphed. (2 marks) yt 6 (2, 6) 4 2 (-1, 0) 2 0 2 4 -2 27. Determine the average rate of change of the function over the domain graphed. (2 marks) ( - 3, 5) . (3, 5) 2 28. Given g(x) = 3x + 1, use the difference quotient to find the instantaneous rate of change when x = 2. (4 marks)