SOLUTION: Find the linear regression equation for the set of values. Round the slope and y-intercept to the nearest hundredth. {(5, -3.4), (10, -0.5), (15, 2.1), (20,5)} Please show me y

Question 887435: Find the linear regression equation for the set of values. Round the slope and y-intercept to the nearest hundredth. {(5, -3.4), (10, -0.5), (15, 2.1), (20,5)}
Please show me your work so that I can see how the problem was solved.
thank you
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
add all x's xt 50
add all y's yt 3.2
add all x^2's xst 750
add all y^2's yst 41.22
add all x*y's xyt 109.5
b = (4*109.5 -(50*3.2)) / (4*750 - 50^2) = 0.556 = 0.56
a = (3.2 - 0.56*50) / 4
a = -6.15
So the linear regression equation is
y = 0.56x-6.15
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