1. **State the problem:** We are given a formula relating distance $d$ and time $t$ for Austin's driving: $$t = \frac{d}{60}$$ We need to identify the independent and dependent variables and explain why. 2. **Understand variables:** - The independent variable is the one you choose or control. - The dependent variable depends on the independent variable. 3. **Analyze the formula:** - $t$ (time) is calculated from $d$ (distance). - So, $d$ is the input, and $t$ is the output. 4. **Fill in the blanks:** - The independent variable is **distance $d$**. - The dependent variable is **time $t$**. - Austin uses the **distance $d$** to calculate the **time $t$**. **Final answer:** The independent variable in this context is distance $d$ and the dependent variable is time $t$. That’s because Austin is using the distance $d$ to calculate the time $t$.