Answer:
k(x)=x³- x { is an odd function}
Explanation:
One way to think about it is what happens when you take f of negative x? If f of negative x is equal to the function again, then we're dealing with an even function. If we evaluate f of negative x, instead of getting the function, we get the negative of the function, then we're dealing with an odd function.
In the first image above we can see that odd are like letter N so when you graph each of the options the one that is like the letter N is an odd function like the k(x)=x³- x graph in the second Image