1. The problem asks to express $y = 67.5h$ in terms of $x$ and $h$. 2. Currently, $y$ is given only in terms of $h$, and there is no explicit relationship involving $x$. 3. Without additional information relating $x$ and $h$, $y$ cannot be rewritten to include $x$. 4. Therefore, the expression remains $y = 67.5h$ as the simplest form involving $h$. 5. If a relationship between $x$ and $h$ is provided, substitution can be done to express $y$ in terms of both variables.