Question 971790
<pre>
Solve it for y:

  x + 2y = -2
 -x           - x
----------------
     2y = -2  - x
     2y = -x  - 2
     2y = -1x - 2
     {{{expr(2/2)*y}}}{{{""=""}}}{{{expr((-1)/2)*x-2/2}}} <--divide ONLY the numbers by 2, not the letters:
      y = {{{expr(-1/2)*x-1}}}

Now compare that to

      y = m*x + b  and see that m = {{{-1/2}}}, which is the slope.

Edwin</pre>