Question

Does the horizontal line slope = 0?

Answer 1

Answer: Yes

Explanation:

When you have a horizontal line it is flat and has no slope at all

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So the slope = 0

Answer 2

Answer: Yes, all horizontal lines have slope of 0

Reason:

Recall that slope = rise/run

The rise tells us how far to go up or down. A horizontal line does neither. There's no change in y value.

So we have slope = rise/run = 0/run = 0, where "run" is any positive number you want. The run is how far to the right we go each time moving up or down.