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A linear function is a mathematical expression which, when graphed, will form a straight line. A linear function is a simple function usually composed of constants and simple variables without exponents as in the example, y = mx + b.
This type of function is popular in economics because of its simplicity and ease in handling.
A linear function is literally a formula for a straight line when solved and all the variables are replaced with constants. The base equation of a linear function is y = mx + b where:
In a linear equation, if you increment the independent variable and plot the points on a graph, you get a straight line.
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