The Correlation Between a Family's Weekly Income and the Amount

question 73

Multiple Choice

The correlation between a family's weekly income and the amount they spend on restaurant meals is found to be r = 0.30. Which must be true?
I. Families tend to spend about 30% of their incomes in restaurants.
II. In general, the higher the income, the more the family spends in restaurants.
III. The line of best fit passes through 30% of the (income, restaurant$) data points.

• A) II only
• B) I only
• C) III only
• D) II and III only
• E) I, II, and III

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Definitions:

Variable Cost

Charges that adjust according to the amount of goods produced or sold, like raw materials and labor costs.

Fixed Costs

Fixed Costs refer to business expenses that do not change, regardless of how much the business produces or sells.

Operating Cash Flow

The cash generated from a company's regular business operations, indicating its ability to cover operational costs and make new investments.

Variable Cost

Expenses that vary depending on the amount of products or services a company generates.