Question

I need to find the equation of the line of best fit yhat= + x (x) 1,1,3,3,5,5,7,7,9,9 and (y) 3,1,3,1,6,3,6,1,4,4

Answer 1

equation of a line is
y=mx+ c

Answer 2

I need coordinates of some points

Answer 3

do u mean (1,3) is a point through which ur line is going

Answer 4

this is the whole problem

x 1 1 3 3 5 5 7 7 9 9
y 3 1 3 1 6 3 6 1 4 4
(a) Find the equation of the line of best fit.
y hat = 1.82
Incorrect: Your answer is incorrect.
+ x

(ii) Graph this equation on a scatter diagram. (Do this on paper. Your instructor may ask you to turn in this work.)

(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 2.1
Correct: Your answer is correct.
3 2.65
Correct: Your answer is correct.
5 3.2
Correct: Your answer is correct.
7 3.75
Correct: Your answer is correct.
9 4.3
Correct: Your answer is correct.

(c) Find the value of e for each of the points above (e = y - y hat).
y e y e
3
Correct: Your answer is correct.
3
Correct: Your answer is correct.
1
Correct: Your answer is correct.
6
Correct: Your answer is correct.
3
Correct: Your answer is correct.
1
Correct: Your answer is correct.
1
Correct: Your answer is correct.
4
Correct: Your answer is correct.
6
Correct: Your answer is correct.
4
Correct: Your answer is correct.

(d) Find the variance se2 of those points about the line of best fit.


You may need to use the appropriate table in Appendix B to answer this question.