Which equation represents the vertical line passing through (1,-9)?

Question

A.
x = -9
B.
x = 1
C.
y = -9
D.
y = 1

Answer 1

The equation that represents a vertical line passing through the point (1, -9) is B. x = 1.

Vertical lines have the same x-coordinate for all points on the line, so since the x-coordinate of the given point is 1, the equation of the vertical line is x = 1.