The fourth vertex would be at point (-9,1).
The slope from (5,-4) to (3,4) is -8/2 or -4.
So I did that with (-7,-7) to the fourth vertex to get the answer.
The answer for this problem would be -52 because when you do 58-6 it give you 52 so i tried -52+58 and what did it give me 6 so -52 is your answer hope that this helps and here is a tip: negative is the only way to go down in addtion just to let you know <span />
Option A = $15,748.096
Formula for compound interest = P(1+Interest Rate)^n
=> 14000(1.04)^3
=$15,748.096