Which equation represents a line with an undefined slope? y = x y = –x y = 0 x = 0

D.

Step-by-step explanation:

We are asked to choose the equation which has an undefined slope.

We know that slope of line will be undefined when the difference between its x-coordinates is 0 as slope is rise over run.

We also know that a vertical line is in form , where, x is any real number.

We also know that slope of a vertical line is undefined as horizontal displacement (run) of a vertical line is 0.

Therefore, the line has an undefined slope.

you can not solvr this without numbers