Math Calculus
posted by Joshua on .
Hi,
I don't have any question specifically but I'm very confused on this.
In integration to find area under/above a curve, when do you integrate:
1) with respect to y
2) with respect to x
3) using x coordinates
4) using y coordinates
Thanks for your help! :)

Look at the piecemeal unit of dArea you are integrating. Is is some y dx or xdy? It is those little differential areas you are integrating.
Here is a x dy dArea.
http://education.yahoo.com/homework_help/math_help/solutionimages/minicalcgt/6/1/1/minicalcgt_6_1_1_3_50/f41321.gif 
Thanks ^^