1. **Problem statement:** Given a graph showing speed (km/h) versus time (hours) for a car journey, answer the following questions. 2. **Formula used:** Distance = Speed \times Time 3. **Important rule:** For a fixed distance, speed and time are inversely related, meaning if speed decreases, time increases. 4. **(a) What is the distance of the journey?** From the graph, at 2 hours, speed = 120 km/h. Using the formula: $$\text{Distance} = 120 \times 2 = 240 \text{ km}$$ 5. **(b) As the speed decreases, what happens to the journey time?** Since distance is constant, if speed decreases, time increases. 6. **(c) If the journey takes 2.5 hours, determine the speed from the graph.** Using the constant distance 240 km: $$\text{Speed} = \frac{\text{Distance}}{\text{Time}} = \frac{240}{2.5} = 96 \text{ km/h}$$ 7. **(d) If speed is 110 km/h, find the travelling time.** Using the formula: $$\text{Time} = \frac{\text{Distance}}{\text{Speed}} = \frac{240}{110} \approx 2.18 \text{ hours}$$ **Final answers:** (a) 240 km (b) Journey time increases as speed decreases (c) 96 km/h (d) Approximately 2.18 hours