Question 391493
Find the slope of the line that passes through each pair of points. 
(2,1),(0,0)=
Slope m = diffy/diffx
m = ((1-0)/(2-0)
m = 1/2
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Do the others the same way.  If diffx = 0, the slope is undefined and the line is parallel to the y-axis.
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(4,5),(6,2)=
(3,8),(7,3)=
(1,0),(-4,2)=
(8,-4),(-6,-3)=
(-2,-3),(6,5)=