Question

What is the equation of a line parallel to the y axis and passing through the point (2,1)?

Answer 1

x = 2

Explanation:

lines parallel to the y-axis are always vertical and begin with 'x ='

Answer 2

x=2

Explanation:

Hi there!

A line parallel to the y-axis would make it a vertical line. Vertical lines have the equation x=d, where d is the x-intercept (the value of x when y=0).

We also need to know that every point a vertical line passes through has the same x-coordinate. Therefore, because this line passes through the point (2,1), we know that the x-intercept is (2,0).

Therefore, the equation of the line would be x=2.

I hope this helps!