It's B because the car gets older as the years of ownership go up; resulting in a negative correlation on a graph. Hope I helped :)
49 is a square given by 7x7 as is clear in your equation, 4 is a square given by 4x4 the operator given is - ( minus) you have two squares, and a difference sign a^2 - b^2 = (a-b)(a+b) 7^2 -2^2 = (7-2)(7+2) = (5)(9) = 45 it is the diffeernce of two squares
Since we are adding two positive numbers here, their sum could be found by writing either
8
+4
---
12
or
4
+8
---
12
