# Math

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x 1 1 3 3 5 5 7 7 9 9
y 3 2 6 1 3 3 3 2 5 3

(a) Find the equation of the line of best fit.

(b) Find the ordinates y hat for the points on the line of best fit whose abscissas are x = 1, 3, 5, 7, and 9.
1 . .
3 . .
5 . .
7 . .
9 . .

(c) Find the value of e for each of the points above (e = y - y hat).
y e y e
3 . . 3
2 3
6 2
1 5
3 3

• Math -

yhat = 3x

• Math -

I got the first part the answers were 2.6 and .1x, I can not figure out the rest of it B & C.

• Math -

There are some of rule you have to follow for particular abscissa.
(2, 4, 6, 8, 10), the abscissa is the half the ordinate
Rule: x = (1/2)y
y = 2x

(1,2 3,4,5): the abscissa is two less than the ordinate.
Rule: y-2 =x
y = x + 2

(1,3,5,7,9), the abscissa is one third of the ordinate.
Rule: x = (1/3)y

y = 3x

(0,1, 2, 3.....,10), abscissa
Rule: y-1 = 2x
y = 2x +1

• Math -

b) yhat = 3x

• Math -

So on B I got the answers, 0.5, 1.5,
2.5,3.5,4.5

And everything that I have tried on C is coming up wrong????