SOLUTION: Are the following lines parallel, perpendicular or neither? L1 with equation x-3y = 9 L2 with equation 3x+y = 3

Algebra ->  Graphs -> SOLUTION: Are the following lines parallel, perpendicular or neither? L1 with equation x-3y = 9 L2 with equation 3x+y = 3      Log On


   

Question 106440This question is from textbook
: Are the following lines parallel, perpendicular or neither?
L1 with equation x-3y = 9
L2 with equation 3x+y = 3 This question is from textbook

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
putting the equations into slope-intercept form (y=mx+b) shows the slopes directly

the slopes are 1/3 and -3 ... negative reciprocals (this is a BIG hint)