High School Math : Perpendicular Lines
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Example Questions
Example Question #34 : Algebra I
Which of the following is perpendicular to the line described by
The definition of perpendicular lines is that their slopes are inverse reciprocals of one another. Since the slope in the given equation is 
The answer
is the only equation listed that has a slope of 
Example Question #35 : Algebra I
Which of the following is perpendicular to the line described by
The definition of perpendicular lines is that their slopes are inverse reciprocals of one another. Since the slope in the given equation is 
The answer
is the only equation listed that has a slope of 
Example Question #2 : How To Find The Slope Of A Perpendicular Line
Which of the following gives the slope of a line that is perpendicular to 
Recall that the slopes of perpendicular lines are opposite reciprocals of one another. As a result, we are looking for the opposite reciprocal of 
Example Question #11 : Perpendicular Lines
Find the slope of the line perpendicular to 
Put this equation into slope-intercept form, y = mx + b, to find the slope, m.
Do this by subtracting 
The slope of this line is 
The slope of the perpendicular line is the negative reciprocal. Switch the numerator and denominator, and then multiply by 
Example Question #12 : Perpendicular Lines
What is the slope of the line perpendicular to 
In standard 
The slope of a perpendicular line is the negative reciprocal of the original line.
For our given line, the slope is 
Example Question #13 : Perpendicular Lines
Find the slope of this line:
Isolate for 
The slope is 
Example Question #1 : How To Find Out If Lines Are Perpendicular
Which of the following are perpendicular to the line with the formula 
I.
II.
III.
I
III
I and III
II
II and III
I and III
The slope of a perpendicular line is equal to the negative reciprocal of the original line. This means that the slope of our perpendicular line must be 3. We can also note that 
Example Question #2 : How To Find Out If Lines Are Perpendicular
Which of the following lines is perpendicular to 
In order for two lines to be perpendicular to each other, their slopes must be opposites and reciprocals of each other, meaning the fraction must be flipped upside down and the signs must be changed. In this situation, the original equation had a slope of 
Example Question #14 : Perpendicular Lines
Which of the following lines will be perpendicular to 
Two lines are perpendicular if they have opposite reciprocal slopes. When a line is in standard 
The slope of our given line is 
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