An equation between any two variables which straight line on a graph is known as a linear equation. In this equation, Ax + By + C = 0, where A, B, and C are neutrals and also A and B will not be together zero.
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Ax + By + C = 0 is± (\(\frac{Ax_1 + By_1 + C}{\sqrt{A^2 + B^2}}\))