### Home > CCA2 > Chapter A > Lesson A.1.3 > Problem A-40

A-40.

The graph at right shows a comparison of the length of several gold chain necklaces (including the clasp) to the total mass.**Homework Help ✎**

Write an equation for the line of best fit.

Hold a straight-edge up to the graph to create a line and estimate the slope and

*y*-intercept.is one possibility.Based on your equation, what would you

expect to be the mass of a-inch chain? Use the rule you wrote in part (a).

Which variable represents mass,or?About

grams.

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