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Linear Function
See It in Action
Two examples of the idea done right—and one common look-alike that is not right.
EXAMPLE
EXAMPLE
NON-EXAMPLE
Definition
A linear function is a type of function that can be represented by a straight line on a graph. It has the general form:
y = mx + b
where m is the slope of the line (indicating its steepness) and b is the y-intercept (the point where the line crosses the y-axis). Linear functions have a constant rate of change and produce a straight line when graphed, reflecting a consistent relationship between the independent variable x and the dependent variable y.
Video
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