1.	Which characteristic describes a graph that is linear and has direct variation.
		A.	Variables x and y are not proportional.
		B.	The equation has the form y = mx.
		C.	The equation has the form y = mx + b.
		D.	The graph does not pass through (0, 0).
		Hint
	2.	Find the equation that has direct variation.
		A.	y = 4x	B.	y = –3x – 1
		C.	y = 5x + 1.3	D.	y = 0.8x + 9
		Hint
	3.	Find the situation that involves a decreasing linear relationship and has direct variation.
		A.	An airplane that begins at 20,000 feet and descends for a landing on the ground at the airport.
		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.	A bucket that begins at ground level and is lowered into a well at a rate of 1 foot per second.
		D.	The temperature that begins at 0°F at 6:00 a.m. rises 3°F every hour for 6 hours.
		Hint
	4.	Find the equation that is nonlinear.
		A.	y = 4y2	B.	y = 14 + 6x
		C.	y = 8 – x	D.	y = –3x – 1
		Hint
	5.	Find the table that represents a graph with direct variation.
		A.
		B.
		C.
		D.
		Hint