Use the graph of y f x assuming f x 0 if x b or f to answer parts A through F a b C d www Ay O A a c c d e g OC b c c d e g OE d e g h OG b c c e g h 9 h B Identity intervals on which the graph of t is concave downward Choose the correct answer below O B e g OD a b e g OF a c c e g h OH The graph is never concave downward