Click and drag the sliders to set the cars speed and starting position.

Then click on the animation buttons:   
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Sample question for Level: Algebra 1
Problem:  Set RED CAR: Speed=15km/h and Start=24km and

                      BLUE CAR: Start=0km.

Question: If the cars meet in 4 hours, what is SPEED of BLUE CAR?
   Use the activity to find your answer and then talk about the math.
Answer A: Using the activity.
  • Set the 3 sliders.
  • Think about what it means to "meet in 4 hours".
  • Find t=4 on the horizontal axis.
  • Move the 4th slider (speed of blue car) until the lines intersect above t=4.
  • See that the slider is at 21km/h.
Answer B: Thinking about the math.
  • Thinking: blue car has to "catch up" 24 km in 4 hours.
  • This means it must go 24km/4h=6km/h faster than red car.
  • The speed of red car is 15km/h.
  • So the speed of blue car is 15km/h+6km/h=21km/h.
Zip for offline use  This InterActivity needs ready-to-use in the classroom worksheets so:

Please write me with questions/ideas for using this activity (include grade level).

Related Topics

Global Car Race Animated Activity
Brief User speed and position of cars in a race to understand slope and intercept.
Grade 6    (or any time after the idea of linear equations - does NOT require explanation of slope and intercept)
Strand Algebra and Functions AF at Math247

Algebra Algebra at Math247

Standard CA 6.AF.2.2 CA 7.AF.1.5 Algebra 1 2.5 ACT GR 24-27
Keywords linear, equation, rate, slope, intercept, dynamic, freeware, applet, offline, online
Comments This activity is suitable for younger children - just change the questions!
Download Zip for offline use
Author LFS - contact
Type Freeware - Available for Offline and Online Use - Translatable (html)
Use Requires sunJava player
 Up one level

Page last modified on February 24, 2010, at 05:36 AM