Answer:
its 245
Step-by-step explanation:
i had a test with the same question, i promise its right :)
19
It is not a function.
For any positive x this graph will give two different values y, and that is not allowed to happen for functions.
The formula for the midpoint is:
(x1 + x2)/2, (y1 + y2)/2
Midpoint = (5+3)/2 , (7+1)/2
Midpoint = 8/2 , 8/2
Midpoint =(4,4)