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A linear equation is a specific type of function that represents a straight line on a graph. While all linear equations are functions, not all functions are linear equations. Functions can take many forms, including non-linear ones that do not result in a straight line on a graph. Linear equations, on the other hand, follow a specific form (y = mx + b) where the x variable has a coefficient and the equation represents a straight line.
Linear equations are a small minority of functions.
They are not. A vertical line is not a function so all linear equations are not functions. And all functions are not linear equations.
Most functions are not like linear equations.
Functions and linear equations are the same in that they both deal with x and y coordinates and points on a graph but have differences in limitations, appearance and purpose. Often, functions give you the value of either x or y, but linear equations ask to solve for both x and y.
Equations are not linear when they are quadratic equations which are graphed in the form of a parabola