SOLUTION: which funtion is not linear? f(x)=8 f(x)=2x^3 f(x)= 14x+7 f(x)= 1/5-3/7x

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Question 484430: which funtion is not linear?
f(x)=8
f(x)=2x^3
f(x)= 14x+7
f(x)= 1/5-3/7x
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
Answer: f(x)=2x^3
.
Linear functions are polynomials of degree 1