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# Parallel and Perpendicular Lines (Grade 9)

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## Parallel and Perpendicular Lines

1.
In a plane, if two lines are perpendicular to the same line, are they parallel?
1. Yes
2. No
2.
Are two lines with the same slope are perpendicular?
1. Yes
2. No
3.
Perpendicular lines have slopes that are opposite in sign and reciprocals of each other.
1. True
2. False
4.
Lines l and m intersect to form congruent supplementary angles. What can you conclude?
1. Lines l and m and skew.
2. Lines l and m are parallel.
3. Lines l and m are perpendicular.
4. None of the above.
5.
Tell whether the lines with the given slopes are parallel, perpendicular, or neither.
Line 1: m = 2
Line 2: m = -2
1. parallel
2. perpendicular
3. neither
6.
Which line is perpendicular to $y = 4x + 5$?
1. $y = - x/4 + 5$
2. $y = -4x + 5$
3. $y = x/4 + 5$
4. $y = 4x - 5$
7.
Write an equation in slope-intercept form for a line containing (3,2) and perpendicular to the line with equation y = -2x + 6.
1. $y = 1/2x - 2$
2. $y = 3x +3$
3. $y = 1/2x + 1/2$
4. $y = -2x + 2$
8.
Which line is parallel to $y = 3x - 7$?
1. $y = -3x - 7$
2. $y = - x/3 + 2$
3. $y = x/3 + 7$
4. $y = 3x + 10$
9.
The graph of which equation passes through (-3,-2) and is perpendicular to the graph of $y = 3/4x + 8$?
1. $y = -3/4x - 5$
2. $y = 3/4x + 1/4$
3. $y = -4/3x + 5$
4. $y = -4/3x -6$
10.
Write an equation for a line that is perpendicular to the line $y=2x+7$.

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