Me with this.

is the function g(x)= -8x–7 linear or nonlinear?

explain how.

It is linear, linear is when it goes in a straight line and nonlinear is when it does curves or what ever. also, Nonlinear Regression Equations. While a linear equation has one basic form, nonlinear equations can take many different forms. The easiest way to determine whether an equation is nonlinear is to focus on the term “nonlinear” itself. Literally, it's not linear.