freeCodeCamp/guide/english/mathematics/area-between-a-curve-and-the-x-axis/index.md

title
Area-between-a-curve-and-X-axis

Area Between a Curve and the X Axis

To find the area between a curve and the x-axis, the most preferred tool is definite integration of the given curve.

To find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b.

Some Examples

NOTE: Areas under the x-axis will come out negative and areas above the x-axis will be positive. This means that you have to be careful when finding an area which is partly above and partly below the x-axis.

More Information:

• Interactive lessons for Area under the Curve