1. The problem asks to describe the relationship between distance traveled $D$ and time $t$ based on the graph. 2. The relationship is either proportional or not proportional. A proportional relationship means the graph is a straight line passing through the origin. 3. The graph is described as either a straight or curved line. 4. The line either passes through or does not pass through the origin. 5. The rate of change (slope) is either constant or increasing. 6. Since distance and time in motion typically have a proportional relationship when speed is constant, the graph is a straight line passing through the origin. 7. This means the rate of change (speed) is constant. Final answer: The relationship is **proportional** because the graph is a **straight** line that **passes through** the origin. This shows that the rate of change is **constant**.