Question

Vertical lines always have an undefined slope true or false

Answer 1

y-axis is the line x = 0, and it is a vertical line. Therefore, all vertical lines, which have undefined slopes, are parallel to the y-axis.

hopes this helpes

Answer 2

true is the answer

Explain: it's impossible to divide by 0, so the slope of a vertical line is always undefined. Now consider the y-axis on a graph. The y-axis is the line x = 0, and it is a vertical line. Therefore, all vertical lines, which have undefined slopes, are parallel to the y-axis.