im still in 7th grade but..
Answer:
2 1/2
Step-by-step explanation:
im going to choose (10,4) as x2,y2 and (6,-2) as x1,y1
so the fraction will look like this: 
now we have to slove it, 4+6 = 10
and 10-6 = 4
we have the fraction 10/4
now simplify: 2 1/2
hopefully i got this correct