Which Equation is a linear function??

Option C

Step-by-step explanation:

A linear function is one that is written as y = f(x) = mx + b

It thus cannot have square roots or exponents

A) A does not follow the format, as "y" is not isolated onto one side.

B) B does not follow the format, as there is a square root

C) C follows the format, because the "y" is on its own side and there are no exponents

D) D does not follow the format because x is being squared.

The only option that follows the format y = mx + b is option C, so that is the answer.