## How to Calculate Slope of Line – Slope of Parallel Lines

How to Calculate Slope of Line If given line makes an angle $$\theta$$ (0 $$\le$$ $$\theta$$ $$\le$$ 180 , $$\theta$$ $$\ne$$ 90) with positive direction of x-axis, then slope of line will be tan$$\theta$$ and is usually denoted by letter m. i.e. m = tan$$\theta$$. Slope of line Passing Through Two Points Formula If A($$x_1,y_1$$) …