If $\sum x _ { i } = 28 , \sum y _ { i } = 54 , \sum x _ { i } y _ { 2 } = 156 , \sum x _ { i } ^ { 2 } = 82 , \text { and } n = 10$

Multiple Choice

If $\sum x _ { i } = 28 , \sum y _ { i } = 54 , \sum x _ { i } y _ { 2 } = 156 , \sum x _ { i } ^ { 2 } = 82 , \text { and } n = 10$ then the least squares estimate of the slope coefficient $\beta _ { 1 }$ of the true regression line $y = \beta _ { 0 } + \beta _ { 1 } x$ is

A) 3.60
B) 0.75
C) 1.33
D) 4.80
E) 1.68