| Example Find two other points on the line that passes through (1,3) and sketch if the slope (I) 2 and (II) -5/2 Solution : I) Slope m = 2 and point (1,3) 2 = i.e. we increase x by 1 and y by 2
Thus we get (1 + 1 = 2, 3 + 2 = 5) = (2,5) or 2 = i.e. we decrease x by 1 and y by 2 Thus we get (1-1 = 0, 3-2 = 1) = (0,1) Hence the other two points on the line through (1,3) are (2,5) and (0,1) 
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8.1 Definition |
(for every 2 up go 1 to the right )
(for every 2 down go 1 to the left)