countonme123
Find the slope intercept form of each equation then graph each line. x + 3y = 6
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countonme123
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i am totally confused on how to work these...
Compassionate
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Hello, my name is Stephen and I'll be your tutor
In the form: y = mx + b, m is the slope of the equation and b is the y-intersect
You first want to put the equation in y = mx + b by solving for y. To do this, take x + 3y = 6, and subtract x, and then divide by 3.
countonme123
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so now it is
y= 2-x
???
Compassionate
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x + 3y = 6
3y = 6 - x
y = 2 - 3x
y = 3x - 2
countonme123
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ok now what?
Compassionate
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Now, you go to -2 on your y-intersect and your slope is 3/1, so you rise 3 and run 1.
countonme123
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:( i am afraid i am confused
Compassionate
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Draw a graph on a piece of paper for me. 10 high and 10 low.
countonme123
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hmm ok got it
countonme123
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|dw:1371941604075:dw|
Compassionate
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|dw:1371942073702:dw|
Those black lines are your middle points. Now, on your y intersect go over -2 spaces
countonme123
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|dw:1371942158203:dw|
Compassionate
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Now rise 3 and over 1
countonme123
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|dw:1371942269038:dw|
Shames
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|dw:1371942319165:dw|
Compassionate
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Correct! Now you've graphed the equation!
countonme123
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yes
countonme123
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i believe it was supposed to be what Shames wrote
Compassionate
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Yup, it is.
Shames
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you only went up 2
countonme123
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ok what about the written answer for x + 3y=6?
countonme123
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@Shames i noticed after your post... thanks for catching me.
Shames
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np
countonme123
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ok what about the written answer for x + 3y=6?
Compassionate
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We just sovled that.
countonme123
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i am not sure what to put though
countonme123
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y = 3x - 2
is that it?
Shames
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(1,1)
countonme123
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That is the slope intercept form ?
Compassionate
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Yes.
countonme123
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ok thanks guys i will post one more
countonme123
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you both helped alot thanks