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## Graphing Distance-Time Graphs

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**GraphingDistance-Time Graphs**(Calculating Speed and Average Speed)**Important Graphing Information**1. Draw your axes 2. Label your axes 3. Choose your intervals 4. Choose appropriate spacing between intervals. 5. Plot your data 6. Draw a line best fit 7. Give your graph a title**What does the line represent in a distance – time graph?**• SPEED Two types of lines used in a distance – time graph. • 1. STRAIGHT LINE • 2. CURVED LINE**A straight, diagonal line indicates…**• Constant Speed Why is the line in a constant speed graph straight and diagonal? • The object is traveling the same distance in the same amount of time.**A curved line indicates…**• Changing Speed**Distance-Time Graph and Changing Speed**What do the different lines indicate when an object is changing speed? • Slowing down Downward Curve Horizontal Line Upward Curve • Stopping • Speeding Up**How to determine total average speed by looking at a line**graph • Find total distance (ending distance) 2. Divide by total time (ending time)**Comparing speeds on a Distance – Time Graph**1. Find the average speed of each line. 2. Compare the steepness of each line. The steeper line indicates: Faster Speeds**Your graph should look like this.**• Calculate the average speed. • How long did the car stop for?**On the same graph, but in a new color fill in the following**information. • Calculate the average speed. • Which had a greater average speed? • How long did the second car stop for?**Practice Average Speed**B. Airplane C. Car D. Racehorse E. Bike Rider The distance-time graph shows the distance that eight different objects cover in 120 seconds or less. Each letter corresponds to a specific object. Figure out the correct average speed for each object.