Question

ok i have a chart that i have to right the line of best fit for and I don't know how to do that please help

Answer 1

You are looking for a line of the form

$y=a+Bx$

such that a,B minimize the distance between the given points and the line.

For that

$B=\frac{\sum ^n_{k=1}(x_ky_k-\bar{y}x_k)}{\sum ^n_{k=1}(x^2_{^{}k}-\bar{x}x_k)}$

and

$a=\bar{y}-\bar{Bx}$

Now we just have to apply the formula

after we apply it we get that

ŷ = 1.50473 x + 12.90922