Line of best fit using calculated double mean point and regression line

Determine line of best fit by eye, by drawing through a calculated double mean point (x̄, ȳ) and by using the equation of the regression line.

The linear regression line of the form y = a + bx
Awareness of issues relating to interpolation and extrapolation, and the interpretation of gradient and intercept are expected.
Non-linear models will not be tested.