Let's say...

Your function = X^2

Your Derivative will = 2X

Your Anti Derivative will = 1/3*X^3

An anti derivative is basically, "What function did I have before to getthisderivative -- in this case, x^2?"

I don't think there is a huge difference between an integral and anti derivative because if I say, "I'm integrating this function." or "I'm taking the anti derivative of this function." They mean the same thing.

Integrals and anti derivatives share this sign:

Spoiler:

If you get...

"The integral from x=1 to x=4 on the graph x^2," then that means you're finding the AREA UNDER THE CURVE X^2 between x=1 and x=4. It's not as simple as flipping a derivative. For this kind of problem, you'll need to take the anti derivative of x^2 and continue on with the Second Fundamental Theorem of Calculus.

Someone else can probably explain it better than me.