Mathematics for IGCSE & O level - Graphs In Practical Situations (Section 4 - No. 28)
If an object's speed increases over time, how does the speed-time graph look?
A horizontal line
A straight line with a positive slope
A straight line with a negative slope
A curved line that is horizontal
Giải thích
Increasing speed is shown by a line sloping upwards on a speed-time graph.