Determine where the graph of the given function is concave upward and concave downward Find the coordinates of all inflection points f x x 9x x 8 O Concave upward for 5 9 x 0 1 concave downward for x 5 9 and x 0 1 inflection at 5 9 98 8 and 0 1 7 9 O Concave upward for x 3 concave downward for x 3 inflection at 3 59 O Concave upward for x 5 9 and x 0 1 concave downward for 5 9 x 0 1 inflection at 5 9 98 8 and 0 1 7 9 Concave upward for X 3 concave downward for x 3 inflection at 3 59