The equation of the line containing the points (3,1) (9,3) and (27,9) is y = 1 / 3x
The equation of a line can be found as follows:
y = mx + b
where
Therefore,
using (3,1) (9,3)
m = 3 - 1 / 9 - 3 = 2 / 6 = 1 / 3
using (3, 1)
1 = 1 / 3(3) + b
1 = 1 + b
b = 0
Therefore,
y = 1 / 3x
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