Reshma is making a necklace using green beads and purple beads in a ratio represented on the following double number line. Fill in the missing values on the diagram and then answer the following question.
If Reshma uses 20 green beads, how many purple beads will she use?
![Reshma is making a necklace using green beads and purple beads in a ratio represented on the following double number line Fill in the missing values on the diag class=](https://us-static.z-dn.net/files/d98/011915a1683518c883f60118b01bf89a.gif)