Which of these ordered pairs is not a point on the graph of x + y= 9

Question

Which of these ordered pairs is not is not a point on the graph of x + y = 9

 

(-3,12)

(-1,8)

(2,7)

(4,5)

Answer 1

x + y = 9

(-3,12): -3 + 12 = 9

(-1,8): -1 + 8 = 7

(2,7): 2 + 7 = 9

(4,5):4 + 5 = 9