paper-weight-graphThe graph shows how the weight of a letter (including the envelope) varies with the number of sheets of paper used.

What is the weight of a single sheet of paper?

What is the weight of the envelope?

If w is the weight of the letter (including the envelope) and s is the number of sheets of paper, what is equation giving w as a function of s (the equation of the line)?

Click here for Notes for Teachers.

Thank you to NRICH for the idea for this problem.

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