5x + y = -7
put x = -3 in above expression,
5 (-3) + y = -7
-15 + y = -7
y = 15 - 7
y = 8
so the first pair is (-3 , 8)
put x = 0
5 *(0) + y = -7
0 + y = -7
y = -7
y = -7
so the pair is (0,-7)
put x = 1
5(1) + y = -7
5 + y = -7
y = - 7 - 5
y = -12
so the pair is (1, -12)