Question 5 Identify the open intervals on which the graph of the function is concave upward or concave downward. Assume that the graph extends past what is shown. 2 points How Did I Do? 18 14- 2 -10 -8 -6 -4 -20 2 4 -_ 18 10 2- -4- 6- Note: Use the letter U for union. To enter oo, type infinity. Enter your answers to the nearest integer. If the function is never concave upward or concave downward, enter NA in the associated response area. concave upward: concave downward:Question 9 Find the linearization of the function f (ac) = - 1 4x+3 at x = -1. 3 points How Did I Do? Va a sin (a) ? L (ac) = Find the true values of f (x) and the approximations using L () below. Round all of your answers to 3 decimal places. You can use a calculator, spreadsheet, browser, etc. to calculate the exact values. The exact value The approximate value f (x) L(x) -1.1 Number Number -1.01 Number Number -1.001 Number Number