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