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Question 268582: Solve graphically.
y=-1/3x-1
4x-3y=18
I feel dumb because I know once you show me how to do this I will go AHHH that's how but for the life of me I cannot figure this out. Please help.
Thanks
Found 3 solutions by checkley77, Alan3354, stanbon:
Answer by checkley77(12844)   (Show Source):
You can put this solution on YOUR website! y=-x/3-1 (red line)
4x-3y=18
-3y=-4x+18
y=-4x/-3+18/-3
y=4x/3-6 (green line)
Intercept (3,-2)
 (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions -x/3 -1 and 4x/3 -6).
Answer by Alan3354(69443)  (Show Source):
You can put this solution on YOUR website! The graphs are 2 straight lines. 2 points is sufficient to plot a straight line.
Where they cross is the solution.
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y = -x/3 - 1
Pick 2 values for x and find y.
x...y
0...-1 --> (0,-1)
6...-3 --> (6,-3)
Plot the 2 points, draw a line thru them
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Do the same for the 2nd eqn.
Where they cross is the solution.
Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Solve graphically.
y=-1/3x-1
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Plot two points:
Let x = 0, then y = -1 giving you point (0,1)
Let x = 3, then y = -2 giving you point (3,-2)
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4x-3y=18
y = (4/3)x-6
Let x = 0, then y = -6 giving you point (0,-6)
Let x = 3, then y = -2 giving you point (3,-2)
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Solution: (3,-2)
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Cheers,
Stan H.
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