(-3,2)
f(x) = 2x - 5
(2,-1)
(-1,10)
(1,9)
(1,4)
f(x) = 2
(0,-5)
(1,2)
(0,7)
(0,6)
f(x) = x^2 +2x +6
(2,2)
(2,14)
(1,-3)
f(x) = -3x +7
