Answer: The equation is x = 2
Step-by-step explanation:
The equation of the line parallel to the y-axis and passes through (2,4), is x= 2. This is because the y -axis is a vertical line whose equation is x=0, hence a line parallel to it must also be vertical , which is x = c, in this case passing through (2,4),so that its equation is derived from the x-coordinate of (2,4).