Find the distance between (8,-2)and (8,-4)

Answer 1

Since these two points lie on the line x = 8, it is quite easy to just plot the points and count the distance yourself. However, in more generic cases, you should use the 'distance formula' that would apply to any set of 2 points.

Answer 2

Did you plot and label the points? If you do you shall see how far apart they are.