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Chapter 6: Q3. (page 297)
Explain how you can estimate the solutions of a quadratic equation by examining the graph of its related function.
The solutions of a quadratic equation can be estimated by the points where the graph of its related function crosses or touches the x-axis.
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Write an expression for the minimum value of a function of the form , where . Explain your reasoning. Then use this function to find the minimum value of
Determine whether each function has a maximum or minimum value. Then find the maximum or minimum value of the function.
Complete parts a-c for each quadratic function.
A tour bus in the historic district of Savannah, Georgia, serves 300 customers a day. The charge is \(8 per person. The owner estimates that the company would lose 20 passengers a day for each \)1 fare increase. If the company raised their fare to this price, how much daily income should they expect to bring in?
Due to increased production costs, the Daily News must increase its subscription rate. According to a recent survey, the number of subscriptions will decrease by about 1250 for each 25垄 increase in the subscription rate. What weekly subscription rate will maximize the newspaper's income from subscriptions?
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