## Precalculus (6th Edition) Blitzer

Note that: $x^3$ is positive when $x$ is positive. $y^3$ is negative when $y$ is negative. This means that the points that satisfy the given statements must have a positive $x$ and a negative $y$. Points in Quadrant IV have positive $x$ values and negative $y$ values. Thus, only points in Quadrant IV satisfy the given statements.