Which equation graphs as a vertical line with an undefined slope? A) y = 3x B) x = 2 3 C) y = 2 3 D) y = - 2 3 x + 1

B) x = 2/3

Step-by-step explanation:

y = a - horizontal line (a - any real number) - slope = 0

x = a - vertical line (a - any real number) - undefined slope

y = mx + b - diagonal line (m - any real number except 0, b - any real number) - m - slope