Question

What is the slope of a line that is perpendicular to the line y = 1? -1,0,1,or undefined are the choices.​

Answer 1

its an undefined slope

Explanation:

the line y=−1 has slope 0 so any line perpendicular to it will have an undefined slope

Answer 2

undefined

EXPLANATION

We want to find the slope of a line that is perpendicular to the line y = 1

The line y=1 is parallel to the x-axis.

In other words, the line y=1 is a horizontal line.

The line perpendicular to y=1 is a vertical line.

The slope of a vertical line is undefined