Question

Find the slope of the line passing through the following points $P(1,-1)$ and $Q(-2,5)$

• A. $-1$
• B. $-2$
• C. $2$
• D. $1$

Answer 1

Answer: (B)

$-2$

Slope of the line passing through the points $(x_1,y_1)$ and $(x_2,y_2)$ is:

$m=\frac{y_2-y_1}{x_2-x_1}$

Therefore, the slope of the line passing through the points $P(1,-1)$ and $Q(-2,5)$ is:

$m=\frac{5-(-1)}{-2-1}=\frac{6}{-3}=-2$

Hence, the slope of the line is $-2$.