**Find the tangents to the curve y = x/3 + x at the points where the slope is 4. What is the smallest slope of the curve? At what value of x does the curve have this slope?**

**Answer:**

**Find the tangents to the curve y = x/3 + x at the points where the slope is 4. What is the smallest slope of the curve? At what value of x does the curve have this slope?**

**Answer:**