In order to accomplish the same goal, a person can click and hold down the mouse button and drag to the right, or hold shift and use the right arrow key. what is the goal?

The goal is selecting text in the document.
You can try in on your own - just open a Word (or whatever program you use) document and click on a word, and do what you wrote above and you will see that more and more parts of a word or more words will be selected the longer you hold Shift and move the right arrow key.

According to my brain it's a rational number because it can be put as a fraction

If you have more than one answers you can mark someone as a brainliest