Question

A straight line passes through the points (2,0) and (-1,1). calculate the slope.

Answer 1

Let $P=\left(x_1{y}_1\right)\equiv (2,0)$

$Q=(x_2,y_2)\equiv (-1,1)$

Slope of $PQ=\frac{y_2-y_1}{x_2-x_1}=\frac{1-0}{-1-2}=\frac{-1}{3}$