What is the slope of this horizontal straight line?

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Solution

We need atleast two points on a line in order to find its slope.
The two points on the line are A (4,4) and B (−4,4).
Slope AB is given by, $m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}}$

Slope AB $= \frac{4 - (4)}{4 - (- 4)}$
$= \frac{0}{8} = 0$

The slope of the given line is zero.
Apart from this calculation, we can also see that the line AB is parallel to the x-axis. Hence, its slope will be 0.

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