Graphing Practice Problem #9
Water Temperature in ^{o}C 
Number of developing clams 
15  75 
20  90 
25  120 
30  140 
35  75 
40  40 
45  15 
50  0 
 A clam farmer has been keeping records concerning the water temperature and the number of clams developing from fertilized eggs. The data is recorded above.
 Make a line graph of the data.
 What is the dependent variable?
 What is the independent variable?
 What is the optimum temperature for clam development?

