Question

Is the line with equation x = 4 horizontal or vertical? What is the slope of this line?

I know the line is vertical, but how do i find the slope.

Answer 1

the slope is 0 because it's a straight line down

Answer 2

OH! IT WAS A TRICK lol... I need to be more observant! Thanks!

Answer 3

If it is a horizontal line, it is undefined?

Answer 4

Answer= undefined for verticle

Answer 5

x=4
means no matter what y is x=4
so (4,0), (4,1), etc are on the line
it is vertical

vertical lines have undefined slope
because change in y divided by change in x
but change in x is 0, and dividing by 0 gives an undefined result

Answer 6

Thank you everyone. This helped a lot.