Question

Which line has an undefined slope? A y = 0 B y = 2 C x = y D x = 2

Answer 1

The answer is D
X=2
Hope I can help(≧∇≦)

Answer 2

Learn this :
VUX -- vertical line, undefined slope, represented by x = a number.
HOY -- horizontal line, 0 slope, represented by y = a number

so the line with the undefined slope is going to be  x = 2