math
posted by Jacqueline .
If the inputs are 1 to 8,3 to 10, 5 to 12, and 7 to 14 what is the rule?

math 
Reiny
looks like we have a slope of 2/2 = 1
let y = x + b
plug in the first point (1,8)
8 = 1 + b
b = 7
y = x + 7
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