SOLUTION: Determine whether the graphs of the following equations are parallel or perpendicular. Explain. 3X-9Y= 9, 3Y=X +12, 2X- 6Y= 12

Algebra ->  Linear-equations -> SOLUTION: Determine whether the graphs of the following equations are parallel or perpendicular. Explain. 3X-9Y= 9, 3Y=X +12, 2X- 6Y= 12      Log On


   

Question 1099622: Determine whether the graphs of the following equations are parallel or perpendicular. Explain. 3X-9Y= 9, 3Y=X +12, 2X- 6Y= 12
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
3X-9Y= 9,   3Y=X +12,   2X- 6Y= 12

Basic Rule: slopes equal means lines parallel (unless the two lines are the same); slopes which are negative reciprocal of each other are perpendicular.

Slopes of your lines in order given:
1/3,   1/3,   and 1/3
.
(Are any pair of your lines the same line?)