Question

can someone help me find the line of best fit for: 2.(2, 12) (4, 21) (6, 19) (8, 30) (10, 29) (12, 26) (14, 35) (16, 40) (18, 46) (20, 42)

Answer 1

someone help pleaaaaaaaaaaaaase

Answer 2

How are you expected to perform this? Manually or by using a spreadsheet or graphical calculator?

Answer 3

spreadsheet is fine

Answer 4

I already graphed it, I just need the equation for the line of best fit in standard form.

Answer 5

in excel its called a trend line

if you're doing it by hand, then just draw a rough line that crosses 2 actual points that you can use and then determine the equation of the line by determining slope and using point slope form

Answer 6

can you help me find the equation please?

Answer 7

The trend line plotted by Excel begins with the ordered pair (2, 15) and ends with the ordered pair (20, 45).
Determine the slope m using
\[m=\frac{y _{1}-y _{2}}{x _{1}-x _{2}}\]
Then use point-slope form to find the equation of the trend line.

Answer 8

If you can use Excel, adding a trend line and selecting the radio button for linear and the box for show equation, you will get a line and the linear equation for that line.
Also, there is a slope() function.