Question 212889: determine if lines l1 and l2 are parallel, perperdicular or neither
l1:y=10/9x-1/7
l2:y=9/10x-9/10
Answer by drj(1380)   (Show Source):
You can put this solution on YOUR website! Determine if lines l1 and l2 are parallel, perperdicular or neither
l1:y=10/9x-1/7 (slope-intercept form)
l2:y=9/10x-9/10 (slope-intercept form)
Step 1. Line 1 has slope of 10/9 and Line 2 has slope of 9/10 by looking at slope-intercept form of y=mx+b where m is the slope and b is the y-intercept.
Step 2. Since the slopes of Line 1 and 2 are not equal they are not parallel.
Step 3. Since the product of the two slopes does not equal to -1 they are not perpendicular. The product is 1 in this case since (10/9)(9/10)=1
Step 4. Therefore the lines are neither perpendicular nor parallel.
I hope the above steps were helpful.
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Good luck in your studies!
Respectfully,
Dr J
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