### Home > CC4 > Chapter 3 > Lesson 3.3.2 > Problem 3-128

3-128.

Write an equation for the line of best fit. What are the units for slope and

*y*‑intercept for your equation?Eyeball a line of best fit. Then estimate the slope and

*y*-intercept of your line.*y*=*x*+ 2Based on your equation, what would you expect to be the mass of a 26-inch chain?

Substitute 26 into your equation for

*x*and evaluate for*y*.