(7, 0) and (0, -35)
5x - y = 35
(3, 0) and (0, -3)
3x - 3y = 9
(6, 0) and (0, -2)
-3x + 9y = -18
(1, 0) and (0, 4)
4x + y = 4
(5, 0) and (0, 10)
2x + y = 10
(12, 0) and (0, -3)
2x - 8y = 24
(-12, 0) and (0, 24)
y = 2x + 24
(-7, 0) and (0, 7)
y = x + 7
(3, 0) and (0, -3)
y = x - 3
(2/5, 0) and (0, 2)
y = -5x + 2
(15, 0) and (0, 5)
x + 3y = 15
(12, 0) and (0, -6)
3x - 6y = 36
(-11, 0) and (0, -22/5)
-2x - 5y = 22