Question 159249
This site gives a good tutorial on the subject:
http://www.purplemath.com/modules/slope.htm
.
Basically, the formula is:
slope = (y2-y1)/(x2-x1)
where 
the x's and y's are the given points.
.
For example, your two points:
[3,2] [-4,3]
is mapped to:
[x1,y1] [x2,y2]
.
Then
slope = (y2-y1)/(x2-x1)
would be:
slope = (3-2)/(-4-3)
slope = (1)/(-7) = -1/7
.
That's it... your slope between those two points is -1/7