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Question 177190: Determine if these lines are perpendicular, parallel or neither. How do I solve this problem?
y=x+7
y=-x+2
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! Determine if these lines are perpendicular, parallel or neither. How do I solve this problem?
y=x+7
y=-x+2
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Parallel lines have the same slope. The slopes of perpendicular lines are negative inverses.
Both these equations are in the slope-intercept form, y = mx+b (m = slope)
The slope of the 1st is 1.
The slope of the 2nd is -1, so they're perpendicular. (1 = -1/1)
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