1.	The graph of a linear function is _______.
		A.	None of these is correct	B.	a horizontal line only
		C.	a straight line	D.	a curved line
		Hint
	2.	Which characteristic describes a graph that is linear and has direct variation.
		A.	Variables x and y are not proportional.
		B.	The graph does not pass through (0, 0).
		C.	The equation has the form y = mx.
		D.	The equation has the form y = mx + b.
		Hint
	3.	Find the situation that involves a decreasing linear relationship and has direct variation.
		A.	A bucket that begins at ground level and is lowered into a well at a rate of 1 foot per second.
		B.	The temperature that begins at 0°F at 6:00 a.m. rises 3°F every hour for 6 hours.
		C.	An airplane that begins at 20,000 feet and descends for a landing on the ground at the airport.
		D.	A submarine that begins at the bottom of the ocean and is raised to the surface of the water at 15 meters per second.
		Hint
	4.	Find the situation that is linear but does not have direct variation.
		A.	At the beginning of the summer, Dina had $200 in the bank. She withdrew $30 to buy a new pair of shorts.
		B.	At the beginning of the summer, Dina had $0 in the bank. She earned $50 mowing lawns the previous week and deposited the money in the bank.
		C.	At the beginning of the summer, Dina had $200 in the bank. She started a job and deposited $10 per week.
		D.	At the beginning of the summer, Dina had $0 in the bank. She started a job and deposited $10 per week.
		Hint
	5.	Find the table that represents a graph with direct variation.
		A.
		B.
		C.
		D.
		Hint