Using Graph B:
http://www.webassign.net/sercp8/2-figure-07.gif

Find the average and instantaneous velocity at t = 9.3 s.

Got -0.75 m/s for average velocity, not at all positive that's correct.

(To be able to view graph, copy and paste the link! Clicking it won't work :( )

Question

Using Graph B: 
http://www.webassign.net/sercp8/2-figure-07.gif

Find the average and instantaneous velocity at t = 9.3 s.

Got -0.75 m/s for average velocity, not at all positive that's correct.

(To be able to view graph, copy and paste the link! Clicking it won't work :( )

anonymous · Answer

By this graph (b) the region near t=9.3 is linear (i.e. straight line). Thus, the velocity in this region is constant and can be found by calculation the slope of the line BC:
$$v_(average) = v(insta.) = (0-10)/(12-8) = -2.5(m/\sec)$$

anonymous · Answer

Thanks again!