SOLUTION: I need help with this question please which pair of linear equations represent parallel lines ? Answer choices: y=2x+3 y=-4x-3 y=-6x-5 y=8x+2

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: I need help with this question please which pair of linear equations represent parallel lines ? Answer choices: y=2x+3 y=-4x-3 y=-6x-5 y=8x+2       Log On


   



Question 1040584: I need help with this question please which pair of linear equations represent parallel lines ?
Answer choices: y=2x+3 y=-4x-3 y=-6x-5 y=8x+2
y=-2x+5 y=-1/4x+7 y=1/6x-5 y=8x-5
Please explain how you got the answer, thank you so much in advance- Emily

Found 2 solutions by ikleyn, Boreal:
Answer by ikleyn(52786) About Me  (Show Source):
You can put this solution on YOUR website!
.
I need help with this question please which pair of linear equations represent parallel lines ?
Answer choices:
y =  2x+3      
y = -4x-3         
y = -6x-5       
y =  8x+2     (*)
y = -2x+5     
y = -1/4x+7    
y =  1/6x-5     
y =  8x-5     (*)

The two lines marked by (*) are parallel. Those and only those.
Because they have equal slope of 8.


Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
Parallel lines have the same slope.
if everything is written in the form y=mx+b, all one has to do is look for the same number in front of the x.
Here, y=2x+3 and y=2x+5 have the same slope and are parallel. They both have a "2x"
Also is y=8x+2 and y=8x-5 are parallel.