Question

True or false: Two lines with undefined slopes are parallel to each other and parallel to the y axis

Answer 1

Correct! lines that have undefined slopes are always parallel to the y-axis as the change in x is 0. A gradient is calculated by the change in y divided by the change in x and anything divided by 0 is referred to as undefined.


`(y_(1)- y_(2) )/(x_(1)- x_(2) )`

(calculation for a gradient)


Hope that helps sorry if its a bit confusing :)