The displacement in feet of a particle moving in a straight line is given by s 12 9t 16 where t is measured in seconds a Find the average velocity in ft s over each time interval 1 4 8 3 6 8 2 8 10 0 iv 8 12 20 10 10 ft s b Find the instantaneous velocity in ft s when t 8 1 ft s c Draw the graph of s as a function of t and draw the secant lines whose slopes are the average velocities in part a Then select the graph of s with the tar 20 ft s 10 EM 10 15 10 15 20 30 ft s X ft s Do 10 15 10 5 5 10 15 20