Question

Which statement best describes how to determine whether f(x) = 9 – 4x2 is an odd function?

Answer 1

Odd, even or neither: 
if 
f(-x) = f(x) => even 
f(-x) = -f(x) => odd  

Answer 2

f(-x)=f(x)=even
f(-x)=-f(x)=odd