1: Calculate the average rate of change of f(x) = (x + 1)/(x - 1) on [7, 9] millan Learning ( Express numbers in exact form . Use symbolic notation and fractions where needed. Question: 2 The tangent line at x = 9 to the graph of f(x) = x - x ^ 2 passes through the points (9, f(9)) and (8, - 55) Find the rate of change off at x = 9 Learning(Give an exact answer. Use symbolic notation and fractions where needed.) Question: 3 The tangent line at x = 25 to the graph of f(x) = sqrt(x) passes through the points (25, f(25)) and (35, 6) Find the rate of change of at x = 25 Question 4: The tangent line at x = 1 to the graph of f(x) = 5x ^ 3 passes through the points (1, f(1)) and (2, 20) Find the rate of change of at x = 1 Question 5: The following function is a ratio of the form y = (ax + b)/(cx + d); y = (4x + 3)/(5x - 8) Find the limit of the function as x -> (Express numbers in exact form. Use symbolic notation and fractions where needed. Enter or if the limit is unbounded)