The double number line below shows the approximate number of kilograms in a certain number of pounds:
Based on the number line, about how many kilograms are there in 9 pounds?
3.50
4.00
4.50
5.00
![The double number line below shows the approximate number of kilograms in a certain number of pounds Based on the number line about how many kilograms are there class=](https://us-static.z-dn.net/files/dfd/925f3ed5ca06dd1f80b50f57db9d7481.jpg)