anonymous
  • anonymous
How would I graph the equation y = 4x - 7 I would go to the left seven spaces and up 4, ja?
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
from y=x, you stretch the graph by 4, which gets you y=4x, so the graph is thinner, then move the graph y=4x down by 7 to get the desired equation
skullpatrol
  • skullpatrol
I would start at the y-intercept (0, -7), because the form of the equation is y=mx + b, where b is the y-intercept.
skullpatrol
  • skullpatrol
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skullpatrol
  • skullpatrol
Now go up 4 units and to the right 1 unit because m = 4/1
anonymous
  • anonymous
Hmm. I see. So how would I solve the 4x - y = 7 I need to solve for y? Wouldn't I divide 4x by itself?
skullpatrol
  • skullpatrol
When you asked to solve FOR y, it means solve with reference to y; that is, get y all alone on one side of the equation.
anonymous
  • anonymous
Yup, so in the equation I need to get 4x off of the right side. How would I do that? Btw, this is part 2 of the question.
skullpatrol
  • skullpatrol
You don't "need to get 4x off of the right side" just get y alone on either side will do.
anonymous
  • anonymous
U huh... but I want to get it off the right side...
skullpatrol
  • skullpatrol
Both x and y are on the LEFT-side 4x - y = 7
skullpatrol
  • skullpatrol
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anonymous
  • anonymous
Ok thanks
skullpatrol
  • skullpatrol
|dw:1354179695390:dw|
skullpatrol
  • skullpatrol
|dw:1354180295761:dw|

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