fit, trend line, and model. PRACTICE 1 Estimate the equation of the line of best fit for each graph. y any points as possible but does not have to go through any of the points on the scatter plot. You can use the equation for a line of best fit to make predictions about bivariate data through interpolation and extrapolation. 20 18- 16- 14- 12- 10- 8- 6- 4- 2 OL YA 20 18- 16- 14 12- 10- 8- 2 4 6 8 10 12 14 16 18 20 A> b 20 18- 16- 14- 12- 10- 8- 6- 4- 2- 2 4 6 8 10 12 14 16 18 20 YA 20 18 16 64 14- 12- 10 2086 8- 6- 6- 42 4. 4- 2- 2- 0 OL 2 4 6 8 10 12 14 16 18 20 X X 2 4 6 8 10 12 14 16 18 20 X