Well let’s see here. To help you understand we’re going to fill in the blanks.
1.(2,6)
3(2) + 4(6)
6 + 24 = 30
Right away we know A isn’t the answer.
2.(2,8)
3(2) + 4(8)
6 + 32 = 38
Let’s now try the other equation.
5(2) - 5(8)
10 - 40 = -30
Now we know that B isn’t our answer neither.
3. (3,9)
3(3) + 4(9)
9 + 36 = 45
Option C isn’t our answer neither.
4. (3,4)
3(3) + 4(4)
9 + 16 = 25
Option D can’t be our answer.
So our answer is option B. (2,8)