Mathematics . solve photo question, .

We should substitute each and check in this case:
The maximum value can only be -3

is 4 - 2(2) ≤ -3 ? 
Lets check:
4 - 4 ≤ -3
0 ≤ -3          ⇔         this is wrong

The solution is the last one because:
-1 - 2(1) ≤ -3
-3 ≤ -3

(1,-1)

Just plug in the answer choices and see which one works.
(x,y)
 ^ ^
Plug in the x-value for x in the equation and do the same for y.

Let's try answer choice D (because I already know it's correct).
(1,-1)
  ^  ^
 x   y

The equation is: 
Plug in!