Question 79242
<pre><font size = 4><b>
Find the value of m in the equation y=mx+3, 
such that (-2,5) is on the graph.


Rule: If a point (1st number, 2nd number) is
on the graph of an equation containg a missing
letter OTHER than x or y, then you 
substitute the 1st number for x and the
2nd number for y into the equation and
solve for that missing letter:

 
     y = mx + 3

So we substitute -2 for x and 3 for y

     5 = m(-2) + 3

     5 = -2m + 3

Add 2m to both sides

2m + 5 = 3

Subtract 5 from both sides

    2m = -2

Divide both sides by 2

    {{{(2m)/2 = (-2)/2}}}

     m = -1

Edwin</pre>