Concept explainers
Consider the following relationships, where one quantity or event causes another to change. Identify the independent and dependent variable in each case, and don’t forget to think about WHY it makes sense that these things are variables.
a. The age of a tree and the height of a tree
b. The number of practice sessions and the quality of a musical performance
c. Your score on a placement test and the math courses you’ve taken previously
d. Your blood pressure and the amount of time you spend exercising each week
e. The value of a share of Apple stock and what year it is
f. he number of songs a band sells on iTunes and the amount of money spent on marketing g. The cost of a cab ride and the number of miles you’re driven
h. The number of customers that want to buy a certain product and the price of that product
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