What is the formula to find the midpoint between two points (x1, y1) and (x2, y2)?
Writing Linear Equations & Parallel & Perpendicular Lines Review

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Mathematics
•
9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Midpoint = (\frac{x1 + x2}{2}, \frac{y1 + y2}{2})
2.
FLASHCARD QUESTION
Front
What is the slope-intercept form of a linear equation?
Back
y = mx + b, where m is the slope and b is the y-intercept.
3.
FLASHCARD QUESTION
Front
How do you find the slope (m) between two points (x1, y1) and (x2, y2)?
Back
m = \frac{y2 - y1}{x2 - x1}.
4.
FLASHCARD QUESTION
Front
What is the relationship between the slopes of parallel lines?
Back
Parallel lines have the same slope.
5.
FLASHCARD QUESTION
Front
What is the relationship between the slopes of perpendicular lines?
Back
The slopes of perpendicular lines are negative reciprocals of each other.
6.
FLASHCARD QUESTION
Front
If a line has a slope of 2, what is the slope of a line that is perpendicular to it?
Back
-\frac{1}{2}.
7.
FLASHCARD QUESTION
Front
Write the equation of a line in slope-intercept form with a slope of 3 and a y-intercept of -4.
Back
y = 3x - 4.
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