Which of the following is a solution of y - x < -3?

(6, 2)
(2, 6)
(2, -1)

(6,2)
 because, since it's (x,y) you fill the 6 in for x, and the 2 in for y.
you end up getting 2-6<-3, which equals -4<-3 (negative four is less than negative three), which is true.
 That is your answer to the equation