What is the distance between a line that has endpoints at (1,5) and (1,-5)?
a. 0
b. 12
c. 10
d. -10

Since the x values (1) and (1) are the same, we just have to worry about the (5) and (-5)

the distance between a (5) and (-5)
would be  (5) - (-5)
which is equal to   (5) + (5) = 10

therefore your answer would be C. 10

note that distance should always be a positive number

I’d say d hope it