Nonlinear regression

Nonlinear regression is when you use math to figure out how two things are related. It's different than normal regression because the relationship between the two things is not a straight line. In nonlinear regression, the math is a little more complicated because the line between the two things looks like an upside-down ‘U’, like a curve instead of a line. Nonlinear regression can help you figure out how these two things are related even if the relationship is not a straight line.