1. The problem states that Justin runs at a constant rate, covering 17 km in 2 hours. 2. We want to find an equation relating distance $d$ (in km) and time $h$ (in hours). 3. The formula for constant rate is $d = r \times h$, where $r$ is the rate (speed). 4. Calculate the rate $r$ by dividing distance by time: $$r = \frac{17}{2} = 8.5 \text{ km/h}$$ 5. Substitute $r = 8.5$ into the formula: $$d = 8.5h$$ 6. This equation shows the distance $d$ Justin runs after $h$ hours at a constant speed of 8.5 km/h. 7. No mixed numbers are used; the rate is expressed as a decimal. Final equation: $$d = 8.5h$$