Solve the system of equations below by graphing.

1.8x +y=3.6
y=x^2-3x-1

What are the approximate solutions rounded to the nearest tenth?
(–1.6, 6.5) and (2.8, –1.5)
(–0.8, 2.1) and (5.6, 13.7)
(2.1, –0.8) and (13.7, 5.6)
(6.5, –1.6) and (–1.5, 2.8)