# Grade 9 Math: Linear Relations and Equations Parallel Lines and Perpendicular Lines

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### What is perpendicular line?

a line that intersect another line at a 45 degree angle
a line that intersect another line at a 90 degree angle
a line that intersect another line at a 30 degree angle
a line that intersect another line at a 15 degree angle

### What is a parallel line?

Parallel lines are lines on a plane that meet
Parallel lines are lines are conjoined together
Parallel lines are lines that do not exist
Parallel lines are lines on a plane that never meet. They are always the same distance apart.

True
False
### Which of equation would be perpendicular to the following line? $$y=\frac{-1}{7}x+6$$
$$y=7x+6$$
$$y=\frac{-1}{7}x+6$$
$$y=7x-6$$
$$y=7x$$