tthomas0557
Determine if the graphs of the given equations are parallel.
y=2x+7
7y+2x=4
what is the slope of the line y=2x+7
what is the slope of the line 7y+2x=4
Are the graphs parallel?
Delete
Share
This Question is Closed
surdawi
Best Response
You've already chosen the best response.
1
slope form
y = mx + b; m is the slope
Fox375
Best Response
You've already chosen the best response.
0
what is the slope of the line 7y+2x=4
tthomas0557
Best Response
You've already chosen the best response.
0
Honestly, I am seriosly lost on this question.. I dont even know where to start
tthomas0557
Best Response
You've already chosen the best response.
0
so for the first one 2 is the slope?
precal
Best Response
You've already chosen the best response.
0
if the slopes are the same, the lines are parallel
surdawi
Best Response
You've already chosen the best response.
1
ok try solving for y
7y+2x=4
tthomas0557
Best Response
You've already chosen the best response.
0
I feel silly but what would be my first step?
surdawi
Best Response
You've already chosen the best response.
1
subtract 2x from both sides
tthomas0557
Best Response
You've already chosen the best response.
0
The slope would be -2?
tthomas0557
Best Response
You've already chosen the best response.
0
for the first?
surdawi
Best Response
You've already chosen the best response.
1
nope write the whole thing
1st equation slope is 2
tthomas0557
Best Response
You've already chosen the best response.
0
ok..... so the second would be the same then?
surdawi
Best Response
You've already chosen the best response.
1
no, try solving for y, will help u
tthomas0557
Best Response
You've already chosen the best response.
0
oh my ok.. let me work this out.. Just a sec
tthomas0557
Best Response
You've already chosen the best response.
0
It would be 4?
surdawi
Best Response
You've already chosen the best response.
1
nope
7y+2x=4
subtract 2x from both sides
tthomas0557
Best Response
You've already chosen the best response.
0
sorry I thought I did.. this is embaressing ... ok just a sec
tthomas0557
Best Response
You've already chosen the best response.
0
For some reason I just keep getting 2
surdawi
Best Response
You've already chosen the best response.
1
7y+2x=4
-2x -2x
7y = -2x + 4 is that correct?
tthomas0557
Best Response
You've already chosen the best response.
0
(4-2x)/7
tthomas0557
Best Response
You've already chosen the best response.
0
yes
surdawi
Best Response
You've already chosen the best response.
1
correct
one extra step
y = -2/7x + 4/7
whats the slope
tthomas0557
Best Response
You've already chosen the best response.
0
is it undefined?
surdawi
Best Response
You've already chosen the best response.
1
y = mx + b
m = -2/7
tthomas0557
Best Response
You've already chosen the best response.
0
I dont see where I went wrong....
surdawi
Best Response
You've already chosen the best response.
1
|dw:1355175754668:dw|
tthomas0557
Best Response
You've already chosen the best response.
0
Oh ok I see that now. WOW how confusing... I hope I can handle the next on my own.. Thanks for your generous help...
tthomas0557
Best Response
You've already chosen the best response.
0
Ok so how would I go about doing a question that asked me this... slope intercept equation of the line whose graph is parallel to y=2x-5 and has te y-interceot (0,9)
There is no way I could do that one on my own!
surdawi
Best Response
You've already chosen the best response.
1
they are parallel so the slope will stay the same
y - y1 = m(x -x1)
y - 9 = 2*(x-0)
y - 9 = 2x
+9 +9
y = 2x + 9