Number 12 multiple choice use the graph for the answer above

The acceleration of an object is the time rate of change of velocity.
That is, the acceleration is given by,
[tex]a=\frac{\Delta v}{\Delta t}[/tex]Where Δv is the change in the velocity and Δt is the time period.
Thus the acceleration is change in the velocity divided by time
Thus the correct answer is option c.