A function is an odd function if it has a special rule: when you flip the inputs to negative, the outputs also flip to negative.
In simpler terms, if you take a number \( x \) and put it into the function, then if you put in \( -x \), the answer will be the opposite.
So, if you have:
- \( f(2) = 4 \)
- \( f(-2) = -4 \)
Then we can say the function is odd!
It's like a mirror for the numbers, flipping them!