How do you take Velocity from Acceleration?

[charan1]

For my HW question I have to take the velocity from an acceleration vs time graph at a certain time.

How do I do this? I was sure that the velocity was the area underneath the curve but its not coming out right at all.

Please help! Thanks

 

[Redbelly98]

The area under the acceleration graph gives the change in velocity. You still need to know what the velocity was initially, or at some other specified time.