Question

Write the equation of the line that is perpendicular

to the y-axis and passes through the point (3, 12).

Answer 1

`y=12`

Explanation:

The
`y`-axis has equation
`x=0`, so the equation of a line perpendicular to the
`y`-axis would be of the form
`y=c`.

The equation of this line given the point
`(3,12)` is
`y=12`.