A class measured the radius and circumference of various circular objects. The results are plotted in the graph. (The next two questions are about this graph.)
45
(7,44).
40
(6, 38)
35
30
(4,25)
circumference (cm)
25
20
(3,18)
15
10
4
6
10
radius (cm)
Does there appear to be a proportional relationship between the radius and the
circumference of a circle? Explain your reasoning. *
Your answer
Why might the measured radiuses and circumferences not be exactly
proportional?
Your answer