Answer: 3
Take the (2,-3) and the (2,0) and write on a sheet of paper.
On top of the numbers you will write x1 on the first 2. Write y 1 on the first -3. Then write x2 on the second 2, and y2 on the 0.
You are going to take the y2 and subtract that by y1. It will look like this
0-(-3) under that you will have x2-x1. It will also look like this.
2-2.
In the end you will have something like this.
0-(-3). 3
———- = ———
2-2 0
3 over zero which simplifies to 3. So three will be your answer. Look at the photo for reference.