Which graph would you use to show distance changing over time?

• A. Solubility
• B. Physical Properties
• C. Density
• D. Distance-Time Graph

Answer: (D)

Tracking distance as time passes is about motion. A graph that plots distance on the vertical axis and time on the horizontal axis shows how far an object travels as time goes by. The slope of this graph corresponds to speed—steeper means faster, flat means no movement, and changing slopes show accelerating or decelerating motion. Other options describe different ideas: solubility relates to how much of a substance dissolves under conditions, density relates mass per volume, and physical properties cover various attributes of matter. None of these show distance changing with time. So the distance changing over time is best shown by a distance-time graph.