8. The graph shows the relationship between the United States dollar and the euro, the currency of the European Union, in December 2011. Part A:
What is the constant of proportionality shown in the graph?*
Exchange Rate (December 6, 2011)
YA
(400, 300)
300
Number of euros
200
(250, 187.50)
100
(120, 90)
0
100 200 300 400
Number of US dollars
Your answer