What is: this is a bad question, Ms. Hartmann! It's not graphable on a number line because it has two variables. This is a linear inequality that should be graphed on a coordinate plane. (Don't worry- your test does not have a trick question like this.)
500
Write the equation of the line perpendicular to y = 3x + 5, passing through (4, 0).
What is y = -1/3 x + 4/3
500
3x + 2y = 30
6x + 4y = 60
Infinite! When you multiply the top equation by 2, you see it is the same as the bottom equation. They are the same line, so every point on the line is a solution that makes both equations true.