The fitting line used to estimate the linear relationship can be found using different methods.

1.

**Eye estimation**

The eye estimation or a rough estimation of the graph of the fitting
line cant be found using two approaches. In the first method the number of
points above and below the line are kept the same. In the second
method, the total deviations (errors ) on either side are kept equal.

2.

**Median Method**

In the median method the entire plot is partitioned into three or four
equal parts and the median point in each partition is identified. The line joining the median points is the straight line fit for the data set.

3.

**Using Graphing Calculator**

When technology is used to make the scatter plot, the built in feature
to find the line of best fit can be used. The graphing calculator not only display the line of best fit, but also returns the regression equation. The line of best fit for the data on Hours walked and Cholesterol level is shown below.