## Finding average acceleration from data points of a velocity time graph?

Well I posted this in the calculus section but think it would be answered easier here since it's mild calculus if any.

1. The problem statement, all variables and given/known data
I'm studying for a Calculus test and I am having trouble on a problem. And who better to ask than the members of physicsforums!?

Basically, we are studying average acceleration, velocity, secant and tangent lines. We are given the graph of a function, and its corresponding data points.