Select the equation of the least squares line for the given data: (51. 00, 1. 30) , (48. 75, 3. 25) , (52. 50, . 65) , (46. 50, 6. 50) , (45. 00, 5. 85) , (41. 25, 8. 45) , (43. 50, 6. 50) .
1) y = 0. 2x + 3. 5
2) y = 0. 5x + 2. 0
3) y = 0. 8x + 1. 5
4) y = 1. 0x + 1. 0
