Concept explainers
Draw a graph that pictures each situation. Explain any assumptions that you make. Identify the independent and dependent variables. Determine the intervals on which the dependent variable is increasing, decreasing, or constant. Answers may vary.
Michael started buying Navajo crafts with $8000 in his checking account. He spent $200 per day for 10 days on pottery, then $400 per day for the next 10 days on turquoise and silver jewelry. For the next 20 days, he spent $50 per day on supplies while he set up his retail shop. He rested for 5 days then took in $800 per day for the next 20 days from the resale of his collection. Graph the amount in his checking account as a function of time.
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