1.	The graph of a linear function is _______.
		A.	None of these is correct	B.	a straight line
		C.	a curved line	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.
		B.	Variables x and y are not proportional.
		C.	The graph does not pass through (0, 0).
		D.	The equation has the form y = mx.
		Hint
	3.	Find the equation that contains a decreasing linear relationship.
		A.	y = 12+ 2x	B.	y = 4x – 3
		C.	y = 5 – 6x	D.	y = 10 + x
		Hint
	4.	Find the situation that involves a decreasing linear relationship and has direct variation.
		A.	The temperature that begins at 0°F at 6:00 a.m. rises 3°F every hour for 6 hours.
		B.	An airplane that begins at 20,000 feet and descends for a landing on the ground at the airport.
		C.	A submarine that begins at the bottom of the ocean and is raised to the surface of the water at 15 meters per second.
		D.	A bucket that begins at ground level and is lowered into a well at a rate of 1 foot per second.
		Hint
	5.	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