A

David

Darling

linear

linear graph

The graph of y = ax + b.


To be linear implies having only a multiplicative factor. A linear relationship is a relationship between two variables such that, if one is plotted as a function of the other (see analytical geometry), the result is a straight line. If f(x) is a linear function, then f(a+b) = f(a) + f(b) and c f(x) = f(cx) must both be true for all values of a, b, c, and x.