Diego measured the diameter and circumference of several circular objects and recorded his measurements in the table.

One of his measurements is inaccurate. Which measurement is it? Explain how you know.
Complete the table. Use one of the approximate values for

Name a segment that is a radius. How long is it?
Name a segment that is a diameter. How long is it?
Consider the equation
Find four pairs of
Plot the points
Based on the graph, can this be a proportional relationship? Why or why not?