Question

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

a. The line is horizontal. The slope is 0.
b. The line is horizontal. The slope is 1.
c. The line is vertical. The slope is undefined.
d. The line is vertical. The slope is 0.

Answer 1

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

Hope this helped

Answer 2

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=(y_2-y_1)/(x_2-x_1)=(1-1)/(x_2-x_1)=(0)/(x_2-x_1)=0`

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

The answer is a.