We have the following information:
- She started with 0 points.
- She earned 50 points and the 10 points.
- She lost 80 points.
The word "earned" indicates addition and the word "lost" indicates that we must subtract.
So, based on the explained above, you can write the following operation:
![0+50+10-80](https://img.qammunity.org/2023/formulas/mathematics/high-school/9s9l727y66enzkbde943f64yvanfwed05q.png)
Adding the numbers, you get the following result:
![=60-80=-20](https://img.qammunity.org/2023/formulas/mathematics/high-school/lc9o5iryu9lnzzeorex4k020odu2685o2p.png)
So, you must find the number line that has a dot on the number -20.
If you see the picture, you can conclude that the number line that shows her ending score in the game is the OPTION B.