ticket prices for those games. Ticket price is the independent variable, and the quantity of tickets purchased is the dependent variable.
You may recall from your high school courses that mathematicians always put the independent variable (cause) on the horizontal axis and the dependent variable (effect) on the vertical axis. Economists are less tidy; their graphing of independent and dependent variables is more arbitrary. Their conventional graphing of the income-consumption relationship is consistent with mathematical presentation, but economists put price and cost data on the vertical axis. Hence, economists graphing of IU's ticket price-attendance data conflicts with normal mathematical procedure.
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