Mai and Tyler work on the equation together. Mai's solution is and Tyler's is . Here is their work. Do you agree with their solutions? Explain or show your reasoning.

Solve

Next to each arrow, describe what is done in each step.

A length of ribbon is cut into two pieces to use in a craft project. The graph shows the length (in feet) of the second piece, , for each length of the first piece, .

1. How long is the ribbon? Explain how you know.
2. What is the slope of the line?
3. Explain what the slope of the line represents and why it fits the story.

<p>The graph of a line in the x y plane, origin O, with grid. Horizontal axis, length of second piece in feet, scale 0 to 16, by 1’s, Vertical axis, length of first piece in feet, scale 0 to 16, by 1s. The line crosses the y axis at 15 and the x axis at 15.</p>