1. Imagine that a line on a Cartesian graph is approximately the distance y in feet a person walks in x hours. What does the slope of this line represent? How is this graph useful? Provide another example for your colleagues to explain.

2.What are the differences among expressions, equations, and functions? Provide examples of each.

3.Explain the concept of modeling. How does a model describe known data and predict future data? How do models break down? Can you think of an example?