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# Identifying Parallel and Perpendicular Lines (Grade 9)

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## Identifying Parallel and Perpendicular Lines

1.
Line Q and line R each have a slope of 4. They are
1. curved.
2. the same.
3. parallel.
5. none of the above
2.
Determine if the lines given are parallel, perpendicular, or neither.
$y - 4 = 3(x +5)$
$y + 3 = 1/3(x + 1)$
1. parallel
2. perpendicular
3. neither
3.
How are the lines $y=3x-4$ and $y=3x+4$ related?
1. Parallel
2. Perpendicular
3. Neither
4. Both
4.
How are the lines $y=-2x-4$ and $y=1/2x$ best classified?
1. Parallel
2. Perpendicular
3. Neither
4. Both
5.
How are the lines $y=-2x-4$ and $y=-1/2x-4$ related?
1. Parallel
2. Perpendicular
3. Neither
4. Both
6.
What is the slope of another line PARALLEL to the following linear equation?

$y=-8x+7$
1. $-7$
2. $8$
3. $-1/8$
4. $-8$
5. $7$
7.
Which line is parallel to $y = 3x - 7$?
1. $y = -3x - 7$
2. $y = - x/3 + 2$
3. $y = x/3 + 7$
4. $y = 3x + 10$
8.
Which line is perpendicular to $y = 4x + 5$?
1. $y = - x/4 + 5$
2. $y = -4x + 5$
3. $y = x/4 + 5$
4. $y = 4x - 5$
9.
Which equation is parallel to $y=2x+3$?
1. $y=1/2x-4$
2. $y=2x+8$
3. $y=-1/2x-4$
4. $y=-2x+2$
10.
Which equation is perpendicular to $y=1/3 x +3$ ?
1. $y=3x$
2. $y=1/3x$
3. $y=-1/3x$
4. $y=-3x$
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