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Question 72243: Graph 2x+2y=4 by plotting points. The rule of thumb suggests plotting 3 points and then draw a line so plot at least 3 points . Draw an accurate and straight line through plotted points
Found 2 solutions by rmromero, stanbon:
Answer by rmromero(383)   (Show Source):
You can put this solution on YOUR website!
Graph 2x+2y=4 by plotting points.
To graph this equation we have to assume values of x.
Substitute the values of x to the equation to find y.
Then plot the points.
Draw a line.
Assume values of x.
x y
-2 4
0 2
2 0
2x+2y=4, x = -2
2(-2) + 2y = 4 simplify
-4 + 2y = 4
2y = 4 + 4 add both sides by 4
2y = 8 divide both sides by 2
y = 4
2x+2y=4 , x = 0
2(0) + 2y = 4
2y = 4 divide both sides by 2
y = 2
2x+2y=4, x = 2
2(2) + 2y = 4
4 + 2y = 4
2y = 4 - 4
2y = 0
y = 0
Plot the points (-2, 4), (0, 2), (2, 0)
Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Graph 2x+2y=4 by plotting points
Divide thru by 2 to get:
x+y=2
Solve for y:
y=2-x
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Let x=0, then y=2, giving you point (0,2)
Let x=1, then y=1, giving you point (1,1)
Let x=2, then y=0, giving you point (2,0)
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Cheers,
Stan H.
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