Analytical Geometry 2D

# Linear equation

## Keywords: Linear equation

 Slope–intercept form of linear equation $y=mx+b$ Slope $m=tg\alpha$ Intercept form of linear equation $\frac{x}{a}+\frac{y}{b}=1$ General form of linear equation $Ax+By+C=0$ Normal Vector $\stackrel{\to }{n}\left(A,B\right)$ Direction Vector $\stackrel{\to }{v}\left(-B,A\right)$ Equation of a Line from 2 Points: $\frac{y-{y}_{1}}{x-{x}_{1}}=\frac{{y}_{2}-{y}_{1}}{{x}_{2}-{x}_{1}}$