# Thread:

1. ## Help With Project

Very lost with a project in math class.
Need to find out and show work to see of this system is parallel, perpendicular or neither?

x-3y=-5
y=3x-9

Any Help on how to find this out?

2. You should know that an equation in the form $y = mx + c$ (or $y = ax + b$)

has the gradient as m and y-intercept as c.

If the gradient of the two lines are the same, then they are parallel.
If their product gives -1, it means they are perpendicular.
If they are neither the same, nor their product gives -1, then they are neither parallel nor perpendicular.
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