Double Number Line For Comparisons

Below are two double number lines. You can use just the first double number line for creating quantities in a single ratio or both double number lines for comparing two ratios. It is limited to expanding ratios to be greater than the original ratio. For each double number line.
  1. Choose which quantity you want in the top number line. Label your number lines
  2. Place the original quantities from the ratio in the first vertical set of input boxes beside zero.
  3. Create your top quantity's number line. To do this, click on the input box and enter your value. You can use the "Tab" key to go from one input box to the next.
  4. The bottom quantity's number line will automatically be populated.