Question

Hello Everybody!

I urgently need help on this. Pleas help me!

Medal and Fan for the first person to help...

I need to know what is the line of best fit for the data:

66.7 ,64.9
69.2 ,70.1
74.4 ,70.6
68.7 ,68.8
66.1 ,64.1
64.2, 63.7
67.2 ,65.3
65.1, 63.3
66.2 ,64.5
66.4 ,65.7
66.8 ,65.1

If you can, please explain how I should find it.
Also, please explain to me how I would sketch it on a scatter plot.

Thank you and have a lovely day!

Answer 1

Have you tried plotting them using Excel?

Answer 2

yep thats the way to go

Answer 3

i usually prefer using formulas so the line of best fit can be derived using the following
\[r = (n(\Sigma xy) - (\Sigma x)(\Sigma y))/\sqrt{(n \Sigma x^2 - (\Sigma x)^2) ((n \Sigma r^2) - (\Sigma y)^2 )}\]
I would ecpect you to go with the option @welshfella and @pythagoras123 presented lol.

Answer 4

Hello @welshfella and @phytagoras123 I used desmos to plot the graph?? Is excel a better option?

Answer 5

No GeoGebra is the best option i can teach you a trick there that would allow you to get the line of best fit immidiatley

Answer 6

@Will.H Can you please?

Answer 7

Sure

Answer 8

As showing type the order Correlationcoefficent and you will have to list the coordinates you have and BOOM see the magic occur :)

Hope that helps

Answer 9

Thank you very much!

Answer 10

You welcome :) tag me if you have further questions

Answer 11

@Will.H

Can you please help me?

Answer 12

Make an new post and tag me

Answer 13

cool