Graphing Distance-Time Graphs (Calculating Speed and Average Speed)

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Presentation transcript:

Graphing Distance-Time Graphs (Calculating Speed and Average Speed)

Important Graphing Information 1. Draw your axes 2. Label your axes (x is independent; y is dependent) 3. Choose your intervals 4. Choose appropriate spacing between intervals. 7. Give your graph a title 5. Plot your data 6. Connect data points 8. Design a key if more than 1 set of data is used

Practice Graphing DistanceTime 0 meters0 seconds 5 meters10 seconds 10 meters20 seconds 10 meters50 seconds 15 meters60 seconds How does the time affect the distance a person traveled? Graph the information below. What would your x and y axes be? What intervals would you choose? Based off your graph paper how manty lines would you skip between intervals?

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? Downward CurveHorizontal LineUpward Curve Slowing down Stopping Speeding Up

How to determine total average speed by looking at a line graph 1.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. Faster Speeds 2. Compare the steepness of each line. The steeper line indicates:

Create a graph using the following data: Distance (m) Time (s)

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. Distance (m) Time (s) Calculate the average speed. Which had a greater average speed? How long did the second car stop for? 40

Practice Constant Speed

Practice Changing Speed

Practice Average Speed 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. B. Airplane C. Car D. Racehorse E. Bike Ride r