1. Solving Ratio Problems using Double Number Lines

2. This is a double number line.
Visual
This is a double number line.
It can be used to solve ratio problems.
What ratio is represented here?

3. Definition
A double number line is a number line with a scale on top and a different scale on the bottom. It can be used organize and compare ratios.
What does this double number line tell you?

4. Sample Problem #1
Marla ran 1 mile in 15 minutes. At the same rate, how much time will it take her to run 3 miles? Show your solution using a double number line.

5. Sample Problem #2
A water bottle factory can produce 900 bottles in 3 hours. How many bottles will it produce in 8 hours? Use a double number line to show your solution.

6. Group Math Task: Nana’s Chocolate Milk