The figure below shows a function,h(t),and four lines labeled A, B, C and D. Here h is the height of an object in meters and t is time in seconds.

Question

The figure below shows a function, h(t),and four lines labeled A, B, C and D. Here h is the height of an object in meters and t is time in seconds. Each line corresponds to a velocity (perhaps instantaneous; perhaps average.) Match the letters to the appropriate velocities below. Put the letter E on the velocity that does not correspond to any line. 

Average velocity on [1,2] :

Instantaneous velocity when t = 3 s :

Instantaneous velocity at t = 1s :

Velocity at t = 2s :

Velocity on [1,3] :

Answer 1

The tangent lines mark the instantaneous.

The secan lines mark the averages.