Compassionate
  • Compassionate
Y = -2x + 3, how would I graph the -2x part?
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
every X-axis number, go down 2 (y-axis numbers)
Mimi_x3
  • Mimi_x3
\[y=-2x+3\] To skectch; find the \(x\) intercept and \(y\) intercept. \(y\)-interecept: \(x\) = \(0\) \(x\)-intercept: \(y\)\=\(0\)
Compassionate
  • Compassionate
I'm asking how I would work the equation out and do the whole (-1, 1) thing.

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anonymous
  • anonymous
Y=Mx+B
anonymous
  • anonymous
the "B" is the number on the y-axis
anonymous
  • anonymous
|dw:1342159491528:dw|
anonymous
  • anonymous
are you still confused?
Compassionate
  • Compassionate
Yes.
anonymous
  • anonymous
sorry i didnt see it was -2, i thought it was positive 2.................after you find the "b" you go down 2 (to the right)
anonymous
  • anonymous
|dw:1342159875720:dw|
anonymous
  • anonymous
(0,3).....(1,1).....(2,-1)
Compassionate
  • Compassionate
So I find B by graphing 3, and then go down -2?
Compassionate
  • Compassionate
Why did it go over 1?
anonymous
  • anonymous
that how you graph it.....
anonymous
  • anonymous
after you find the "dots" on the graph, you can make a line
anonymous
  • anonymous
|dw:1342160217623:dw|
anonymous
  • anonymous
|dw:1342160252113:dw|
anonymous
  • anonymous
heres a site (just for in case. lol)
anonymous
  • anonymous
http://www.freemathhelp.com/equation-grapher.html
Compassionate
  • Compassionate
Why did my negative 2 become positive, and where did (2, -1) come from -_-
anonymous
  • anonymous
|dw:1342160578279:dw|
Compassionate
  • Compassionate
So I basically put 1 over the number with the x next to it. +3 = 3, and 2x = 1/2x which means down 2, and over one, which will give me the correct answer.
anonymous
  • anonymous
its becoming negative not positive
Compassionate
  • Compassionate
Kk
anonymous
  • anonymous
"So I basically put 1 over the number with the x next to it.".....yes, the x is the x-axis
Compassionate
  • Compassionate
okay.
anonymous
  • anonymous
the "+3" lies on the y-axis
anonymous
  • anonymous
which is why i started off with (0,3).......it doesnt lie on the x-axis [x,y] < the 3 replaces the y.
anonymous
  • anonymous
|dw:1342160891990:dw|
anonymous
  • anonymous
|dw:1342161018710:dw|
anonymous
  • anonymous
|dw:1342161171583:dw|
anonymous
  • anonymous
|dw:1342161211873:dw|
anonymous
  • anonymous
do you get it now????
anonymous
  • anonymous
http://www.math.com/school/subject2/lessons/S2U4L3GL.html
anonymous
  • anonymous
it will help you hopefully

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