Question

Line m is parallel to the y-axis, and its slope is _____.

positive
negative
undefined
0

Answer 1

The answer is Undefined

Answer 2

undefined

Explanation:

The y-axis is a vertical line.

The point
`(0,y_1)` and
`(0,y_2)` lies on the y-axis.

The slope of this line is

`=(y_2-y_1)/(0-0)`

`=(y_2-y_1)/(0)`

Division by zero is undefined.

All vertical lines have undefined slopes because they are parallel to the y-axis.

Therefore the slope of m is undefined.