N = 460, ∑x = 3920, ∑y = 2650, ∑x2 = 48,530

∑xy = 26,570,

Find the population regression line.

To multiply or to times

Ithink that's 30240

Regression line is given in the form of: y = a + bx

Where b is the gradient

Working out 'b'

Σxy - [ΣxΣy]/N

Σx² - [Σx]²/N

Working out 'a'

a = [∑y/N] - b[∑x/N]

a = [2650/460] - 0.264[3920/460]

a = 5.86 - 2.25

a = 3.61

Regression line equation is

y = 3.61 + 0.264x

Where b is the gradient

Working out 'b'

Σxy - [ΣxΣy]/N

Σx² - [Σx]²/N

Working out 'a'

a = [∑y/N] - b[∑x/N]

a = [2650/460] - 0.264[3920/460]

a = 5.86 - 2.25

a = 3.61

Regression line equation is

y = 3.61 + 0.264x

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