Definitions for "Linear function"
A function whose graph is a straight line graph (example) A "function" is a relation in which each element in the domain is matched with only one element of the range If y = f(x) we call y the dependent variable and x the independent variable. A function can be specified: numerically: by means of a table algebraically: by means of a formula graphically: by means of a graph
The equation of a straight line. A linear equation is of the form y=mx+b, in which y varies "linearly" with x. In this equation, m determines the slope of the line and b reflects the y-intercept, the value y obtains when x equals zero.
a function whose graph consists of segments of one straight line throughout its domain