The slope of the line that goes through (-3, -5) and (-3, -6) is ______.

Question

I think the answer is "zero" is that correct?

Answer 1

wait no... its "undefined"

Answer 2

m = tan θ = ( y2 - y1 ) / ( x2 - x1 )

m = [ ( -6 - (- 5 ) ] / [ ( -3 - (- 3 ) ] = - 1 / 0 → ∞

undefined