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

3-128.

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

  1. 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 + 2

  2. Based 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.