Mathematics
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OpenStudy (anonymous):
How do you do this type of problem?:
x+2y=0
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myininaya (myininaya):
what are you trying to do to it?
OpenStudy (anonymous):
Solve it.
OpenStudy (anonymous):
And then I graph it. But I know how to graph.
OpenStudy (anonymous):
\[x+2y=0\]
myininaya (myininaya):
solve it for what? do you want x-intercepts, y-intercepts. finding these will be useful in graphing.
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OpenStudy (anonymous):
Ok I need to find M and B if that makes sense. So yeah x and y intercepts.
myininaya (myininaya):
you need to write in slope intercept form: y=mx+b
solve the equation above for y by subtracting x first
let me know what you have after you do this
OpenStudy (anonymous):
0+2y=-1?
myininaya (myininaya):
what happen to the x?
myininaya (myininaya):
2y=-x
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OpenStudy (anonymous):
and thats it?
myininaya (myininaya):
no its not in this form y=mx+b yet
what do we need to do next
OpenStudy (anonymous):
Divide by two?
myininaya (myininaya):
right so we have y=-x/2
so what is m=? and what is b=?
OpenStudy (anonymous):
m=1\1
b=0
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OpenStudy (anonymous):
Is that right?
myininaya (myininaya):
m=-1/2 and b=0
OpenStudy (anonymous):
ok. How would you do y=-4
myininaya (myininaya):
y=-4 is a horizontal line going through -4 on the y axis
OpenStudy (anonymous):
Ok so let me give you a problem. Me work it out and will you tell me if its right?
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OpenStudy (anonymous):
My next problem is:
2x+3y+6
OpenStudy (anonymous):
y=2\3=2
m=2\3
b= 2
myininaya (myininaya):
what did you write for the y=mx+b form
OpenStudy (anonymous):
y=2\3x=2
myininaya (myininaya):
2x+3y=6
-2x -2x
3y=-2x+6
_ _ _
3 3 3
y=-2x/3+2
so the slope is m=-2/3
the y intercept is b=2
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OpenStudy (anonymous):
One more equation I just dont get.
OpenStudy (anonymous):
x-2y=-4