(1) Your friend is thinking about buying shares of stock in a company. You have been tracking the closing prices of the stock shares for the past 90 trading days. Which type of graph for the data, histogram or time-series, would be best to show your friend? Why?

• A histogram because the pattern of stock prices over time is less relevant than the frequency of a range of closing prices.
• A time-series graph because the pattern of stock prices over time is less relevant than the frequency of a range of closing prices.
• A histogram because the pattern of stock prices over time is more relevant than the frequency of a range of closing prices.
• A time-series graph because the pattern of stock prices over time is more relevant than the frequency of a range of closing prices.

(2) It is costly in both time and money to go to college. Does it pay off? According to the Bureau of Census, the answer is yes. The average annual income (in thousands of dollars) of ahouseholdheaded by a person with the stated education level is as follows:14.4if ninth grade is the highest level achieved,34.4for high school graduates,50.0for those holding associate degrees,60.0for those with bachelor's degrees,71.4for those with master's degrees, and83.6for those with doctoral degrees. Make a bar graph showing household income for each education level.

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