Question 72243
<pre>
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)

{{{graph (200, 200, -4, 5, -4, 7, -x+2)}}}