SOLUTION: determine if lines l1 and l2 are parallel, perperdicular or neither l1:y=10/9x-1/7 l2:y=9/10x-9/10

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.

For FREE Step-By-Step videos in Introduction to Algebra, please visit
http://www.FreedomUniversity.TV/courses/IntroAlgebra and for Trigonometry visit
http://www.FreedomUniversity.TV/courses/Trigonometry.

Good luck in your studies!

Respectfully,
Dr J
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