Select the equation of the least squares line for the given data: (51.00, .6), (48.75, 1.5), (52.50, .3), (46.50, 3.0), (45.00, 2.7), (41.25, 3.9), (43.50, 3.0).
1) y = 0.1x + 2.5
2) y = 0.5x + 1.0
3) y = 0.2x + 3.0
4) y = 0.3x + 2.0