SOLUTION: 9x+4y=1 4x-9y=3 which is it parallel, perpendicular, or neither? Explain your answer?

Algebra ->  Linear-equations -> SOLUTION: 9x+4y=1 4x-9y=3 which is it parallel, perpendicular, or neither? Explain your answer?      Log On


   

Question 179895: 9x+4y=1
4x-9y=3
which is it parallel, perpendicular, or neither?
Explain your answer?
Answer by HyperBrain(694) About Me  (Show Source):
You can put this solution on YOUR website!
9x+4y=1
4y=-9x+1
y=-9/4x+1/4
The slope of this line is -9/4
4x-9y=3
9y=4x-3
y=4/9x-1/3
The slope of this line is 4/9.
-9/4 and 4/9 are negative reciprocals. Therefore, the lines are perpendicular.
Power up,
HyperBrain!
Stop this mess! Click here