Math - Pre Calc

Question

Find an equation of the line that satisfies the given conditions.

Through (9, 3); perpendicular to the line y = 6

Answer 1

Lines perpendicular to y as a constant have x as a constant.

If x is a constant and the line goes through (9, 3), the line is x = 9

Note that this includes the point (9, 6), which is on the line y = 6.