Algebra 1 : Functions and Lines
Study concepts, example questions & explanations for Algebra 1
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Example Questions
Example Question #1 : How To Find Out If Lines Are Parallel
Which of the following lines are parallel to 
Parallel lines must have identical slopes. The given equation is in the 
Example Question #4 : How To Find Out If Lines Are Parallel
Which of these lines is parallel to 
Parallel lines have the same slope. Since all of these equations are in the 
The only other line with a slope of 2 is 
Example Question #5 : How To Find Out If Lines Are Parallel
Which of these lines is parallel to 
Parallel lines must have equal slopes to one another. Since all of the lines are in the 
Example Question #2 : How To Find Out If Lines Are Parallel
Which of these pairs of lines are parallel?
none of the other answers
Parallel lines have the same slope as one another. The only pair of lines with the same slope is 
Example Question #3 : How To Find Out If Lines Are Parallel
Which of these lines is parallel to 
Parallel lines have identical slopes with one another. The given line has a slope of 9, so its parallel line must also have a slope of 9. The only other line with a slope of 9 is 
Example Question #8 : How To Find Out If Lines Are Parallel
Which of these lines is parallel to
None of the other answers
Parallel lines have identical slopes. Since all of these lines are in the 
Example Question #9 : How To Find Out If Lines Are Parallel
Which of these lines is parallel to 
Parallel lines have identical slopes, so you must figure out which of these lines have the same slope as the given line. To determine the slope of the given line, you can rearrange it to resemble the 
Example Question #4 : How To Find Out If Lines Are Parallel
Two lines are parallel to each other. One of the lines has an equation of 
Parallel lines have identical slopes to one another. The slope of the given line is 7, so the slope of the other line must also be 7. The only other equation with a slope of 7 is 
Example Question #721 : Functions And Lines
What is the relationship of the lines depicted by the following equations?
They are parallel
They are neither parallel nor perpendicular
They are the same line
They are perpendicular
They are parallel
The first equation is written in standard form: 
The second equation is written in slope-intercept form: 
Because the slopes of both lines are equal, the lines must be parallel.
Example Question #722 : Functions And Lines
Which of the following lines is parallel to the line given by the equation 
Parallel lines have the same slope. To find the slope of a given equation, it is necessary to convert it to slope-intercept form.
Subtract the 
Divide by 
Understanding slope-intercepts form, we can see that the slope is 
We can convert each answer choice to slope-intercept form to detrmine which has a slope matching the equation in the question.
This equation has the same slope, and is therefore parallel.
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