Double Number Line for Modeling

Sketch It!

Work Time

Sketch It!

Use the ratio of stars to triangles that you found in Task 3.

  • Sketch a set of objects that has the same ratio but not the same number of objects.
  • Show that the ratio that you made in your picture is equivalent to the ratio in task 3. Draw a double number line to show this; or, use the Double Number Line Tool.
  • On your double number line, find three pairs of numbers that represent the same ratio of stars to triangles.

Ask yourself:

  • In your diagram, what should the ratio of stars to triangles be equivalent to?
  • What pairs of numbers do you need to line up on your double number line?