Direct and Inverse Variation Answers

Which equation represents a direct variation?

In a company, it takes 4 employees 4 days to complete a task. It would take 2 employees 8 days to complete the same task.

An inverse variation function has a k value of 8. Which ordered pair is on the graph of the function?

A 20-ounce candle is expected to burn for 60 hours. A 12-ounce candle is expected to burn for 36 hours. Assuming the variables are directly related, how many hours would a 9-ounce candle be expected to burn?

Which graph represents a direct variation?

When x = 3, y = 16 and when x = 6, y = 8. Which inverse variation equation can be used to model this function?

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The amount of resistance, y, in a circuit varies inversely to the current, x, in the circuit. When 10 ohms of resistance are used in the circuit, 12 amperes of current are present. When 5 ohms of resistance are used in the same circuit, 24 amperes of current are present.

Four pounds of apples cost $5. Eight pounds of apples cost $10. If the total cost of apples, y, varies directly with the number of pounds of apples purchased, x, what is the cost of 6 pounds of apples? Round your answer to the nearest hundredth.