The blue dot on the number line represents the value 20.
The number 8 and 12 on the number line has a line in between that has been assumed for the value that is equal to four. Adding on more 4 to the right of the number line that means towards the number 12 will give the final number that would be on the number line is 20.
Therefore, the last number on the number line is 20.
To know more about the values on the number line, refer to the link below:
https://brainly.com/question/557284
