Question

If f(x) is an odd function and the graph of f(x) includes points in Quadrant IV, which statement about the graph of f(x) must be true?
It includes points in Quadrant I.
It includes points in Quadrant II.
It does not include points in Quadrant I.
It does not include points in Quadrant II.

Answer 1

odd functions are symmetrical across the origin.

Answer 2

An odd function satisfies
f(-x)=-f(x)
which means that both the independent and dependent variables are inverted.

Answer 3

...inverted in sign. This should help determine the quadrants.