The cost of text books for school increases with the average class size identify the independent and dependent quantity in the situation.
a. cost; average class size
b. cost; number of class
c. average class size; cost
d. number of classes; average class size

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes.she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?