SOLUTION: Identify the lines that are perpendicular: LINES: http://my.thinkwell.com/questionbank/92001-93000/92176/img/243357.gif

Algebra ->  Points-lines-and-rays -> SOLUTION: Identify the lines that are perpendicular: LINES: http://my.thinkwell.com/questionbank/92001-93000/92176/img/243357.gif      Log On


   

Question 917810: Identify the lines that are perpendicular:
LINES:
http://my.thinkwell.com/questionbank/92001-93000/92176/img/243357.gif
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

you got
line 1. y=2
line 2. y=+%281%2F5%29x-3
line 3. y=-4
line 4. y=+-5%28x%2B2%29+
by definition, perpendicular lines have slopes negative reciprocal to each other

line 1. y=2 ....slope is zero, line is parallel to x-axis
line 2. y=highlight%28-%281%2F5%29%29x-3... slope is m%5B1%5D=1%2F5
line 3. y=-4....slope is zero, line is parallel to x-axis
line 4. y=+highlight%28-5%29%28x%2B2%29........slope is m%5B2%5D=-5
check if m%5B1%5D=-1%2Fm%5B2%5D; if yes, then lines are perpendicular
1%2F5=-1%2F%28-5%29
1%2F5=1%2F5 ...true, so lines 2 and 4 are perpendicular
+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+%281%2F5%29x-3%2C+-5%28x%2B2%29%29+