Odd/Even functions question

In the Even/Odd functions PrepSwift video, the example at the end of the video uses 3x^0 as an even function and 3x^1 as an odd.

Why is it that in the even exponent example 3x^0 and then in the odd exponent example, 3x^1? When the value of 3x should be the same if it is being used as a constant.

If it is not being used as a constant if a question appears as x^2, x^4, and x —> would I assume x is a constant and be to the power of 0 or would I assume it is a variable and it would be the power of 1?

3x^0 = 1 and doesn’t depend on x whereas 3x depends on x. They’re not the same thing.

No idea what is meant here. Try rephrasing it if it’s still a question that’s bothering you.