Question 79320
<pre>
Make a table and graph x+y=1.

Assume values of x and substitute them to the equation to find y.

Let x = -2              x = 0            x = 2
  x + y = 1            x + y = 1        x + y = 1
  -2+ y = 1            0 + y = 1        2 + y = 1 
      y = 1 + 2            y = 1            y = 1 - 2
      y = 3                                 y = -1


HEre is the table.

            x      |         y
           -2      |         3
            0      |         1
            2      |        -1

Plot the three points. Draw a line passing through the three points.
Here is the graph
{{{graph (200, 200, -5, 5, -4, 7,  -x + 1)}}}