How are graphs used to solve equations?
Analytic Geometry
Read more from

Any figure represented by an equation in two variables is a curve in two dimensions. For example, the equation 3x + 4y = 8 is also called a linear function because the solution represents a line (which is considered a “curve” in geometry) on a graph. There are also graphs of equations in three variables, with the solution as a surface—or the twodimensional “outer layer” of a threedimensional object.