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Is the line for the equation y = 1 horizontal or vertical? What is the slope of this line? Select the best answer.

AThe line is horizontal. The slope is 0.
BThe line is horizontal. The slope is 1.
CThe line is vertical. The slope is undefined.
DThe line is vertical. The slope is 0.

Verified Answer :

naǫ

Any line y=m is horizontal. The y-coordinate of any point lying on such line is m, only x-coordinates change.

If y=1, then two points on the line are (x₁,1) and (x₂,1).

\(\hbox{the slope: } m=\frac{y_2-y_1}{x_2-x_1}=\frac{1-1}{x_2-x_1}=\frac{0}{x_2-x_1}=0\)

So, the slope of this and any horizontal line is 0.

The answer is a.

The line is horizontal and the slope is 0 which would mean the answer is a

Hope this helped

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