1. **State the problem:** We are given the equation $\frac{y}{x} = 6.6$ and need to express $y$ in terms of $x$. 2. **Formula and rules:** The equation shows a ratio of $y$ to $x$. To isolate $y$, multiply both sides of the equation by $x$ (assuming $x \neq 0$). 3. **Intermediate work:** $$\frac{y}{x} = 6.6$$ Multiply both sides by $x$: $$y = 6.6 \times x$$ 4. **Explanation:** Multiplying both sides by $x$ cancels the denominator on the left side, leaving $y$ alone. This expresses $y$ directly as a function of $x$. **Final answer:** $$y = 6.6x$$