Question

A line parallel to the___ has no defined slope, and a line parallel to the_____ has slope of zero.

1) X-axis. 2) x-axis
Y-axis
y-axis.

Answer 1

A line parallel to the y-axis has no defined slope, and a line parallel to the x-axis has slope of zero.

Explanation:

Lines parallel to the y-axis are vertical and are undefined as they don't technically have a gradient.

lines parallel to the x-axis are horizontal and have a gradient of 0 since there is no positive or negative angle, it's just straight.

Hope this helped :)