Question 354616: I have a huge problem with graphing equations.
In my homework I need to graph linear systems and estimate the solution for this equation:
y= -3x+2
y= 2x-3
My answer for where the two lines crossed was (-1,-3) but I don't know if that's right.
Found 2 solutions by Alan3354, stanbon:
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! graph linear systems and estimate the solution for this equation:
y= -3x+2
y= 2x-3
My answer for where the two lines crossed was (-1,-3) but I don't know if that's right.
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Check you answer by subbing it into the equations.
y = -3x+2
-3 =? -3*(-1) + 2
-3 =? 5 It doesn't, so it's not correct.
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To graph linear eqns, you need 2 points.
y = -3x + 2
Pick 2 values for x and find y.
x = 0, y = 2 --> (0,2)
x = 2, y = -4 --> (2,-4)
Plot the 2 points, draw a straight line thru them.
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Do the same for y = 2x - 3
See where they intersect.
PS x and y are integers.
Answer by stanbon(75887)  (Show Source):
You can put this solution on YOUR website! In my homework I need to graph linear systems and estimate the solution for this equation:
y= -3x+2
y= 2x-3
My answer for where the two lines crossed was (-1,-3) but I don't know if that's right.
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Put that x/y pair into each equation and see if your "solution"
is really a solution.
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Putting it into the 1st equation you
would get -3 = -3(-1) = 2
-3 = 3+2
That is wrong so (-1,-3) is not the correct solution.
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I think (1,-1) is the correct answer.
Checking:
y = -3x+2
-1 = -3*1+2
-1 = -1
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y = 2x-3
-1 = 2*1-3
-1 = 2-3
-1 = -1
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The pair 1,-1 checks out in both equations,
so that pair is the solution.
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Cheers,
Stan H.
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