Question

8) What is the slope of the line below *

Answer 1

Horizontal lines have a zero slope, to check it, you can take two points through which the line passes and use the slope formula, that is,

$\begin{gathered} m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}} \\ \text{ Where m is the slope of the line and} \\ (x_1,y_1),(x_2,y_2)\text{ are two points which the line passes} \end{gathered}$

So for example if you take the points

$\begin{gathered} (x_1,y_1)=(-1,3) \\ (x_2,y_2_{})=(-3,3) \end{gathered}$

You have

$\begin{gathered} m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}} \\ m=\frac{3-3}{-3-(-1)} \\ m=\frac{0}{-3+1} \\ m=\frac{0}{-2} \\ m=0 \end{gathered}$

Therefore, the slope of this line is 0.