Question

find the slope of the line through the points named. If the slope is not defined write not defined.
1) (6,4) and (3,-2)
2) (3,5) and (1,5)
3) (3,-6) and (1,5)

Answer 1

you need to try this one by yourself, I am sure you can do it. it's actually simple.. you just need to apply the formula.
if you have two points (x1,y1) and (x2,y2), then the slope
m = (y2-y1)/(x2-x1).. just the difference of the y's over the difference of the x's

Answer 2

of you got a zero in the denominator, then it's undefined..
give it a try :)