Question

if im given a table with data, how do i find the line of best fit? theres no graph btw.

Answer 1

plot the data on a graph paper.

Answer 2

draw a line in such a way that the line touches most points.

Answer 3

i cant use graph paper D':

Answer 4

thank you, but i cant use graph paper on my test tommorow....

Answer 5

Is it a stats question?

Answer 6

Temp. (degrees) 10 50 40 30
Rainfall (mm) 80 90 100 90
this is the graph im looking at

Answer 7

usually we are given a graph but it says to calculate the equation for the line of best fit...

Answer 8

You must define a Fit Measure, otherwise "best" doesn't mean anything. Are you working on a section on Linear Regression or Least Squares?

Answer 9

a linear best fit (linear regression models)

take the averageX and averageY to define the "point" of the line with

then the slope of the line is a bit more calcuation extensive but follows the basic setup:\[\frac{n\sum xy-\sum x\sum y}{n\sum xx-\sum x\sum x}\]

Answer 10

xx: 100 2500 1600 900

x: Temp. (degrees) 10 50 40 30; sum x = 130
y: Rainfall (mm) 80 90 100 90; sum y = 360

xy: 800 4500 4000 2700

and since there are 4 points, n=4

Answer 11

thanks so much :)

Answer 12

youre welcome