Which function will be the best?

E. Linear.

Step-by-step explanation:

Linear functions are straight, and in this case, Ian deposits $10 dollars every month. That means that if this is a linear function, it would be modeled by the equation y = 10x.

This cannot be an exponential function because the money is not growing exponentially, curved way too fast.

This cannot be a quadratic function, which looks like a U-shape.

This cannot also be a square root, which is a curve function and has no sense with this type of problem.

12m

step-by-step explanation:

square root means have of a number so have of 3 is 1.5 then multiply it by 8 and you get your answer!