This example illustrates the origin of the term “linear”: the graph of y = x is a straight line, ... While linear functions are easy enough to ... Explained: Linear and nonlinear systems ...

Such functions are called linear, for reasons that I'll explain soon enough ... = βx and the graph of this function is the straight line in the plane passing through the origin with slope β.

Chapter 4 (Linear Equations in Two Variables) of Class 9 Maths NCERT Book can be downloaded from here in PDF format. Get the latest edition of the chapter along with the best-explained NCERT ...