Hey

I just took a quiz and got this question wrong:

Is the given functions even, odd, or neither?

$\displaystyle f(x) = - 4x + \left| {8x} \right|$

I answered it was odd because the x coefficient of both terms have a power of 1:

$\displaystyle f(x) = - 4{x^1} + \left| {8{x^1}} \right|$

Why did I get this answer wrong?

Sam