What is the average income (in dollars) of a household with 4 members if the first member earns $40,000, the second earns $50,000, the third earns $60,000, and the fourth earns $70,000?
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Which exponential function grows faster, f(x) = 10^x or f(x) = e^x?
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What is the slope-intercept form of a line passing through the points (2, 4) and (5, 9)?