1.	The graph of a linear function is _______.
		A.	a horizontal line only	B.	a straight line
		C.	a curved line	D.	None of these is correct
		Hint
	2.	Find the equation that has direct variation.
		A.	y = 5x + 1.3	B.	y = 0.8x + 9
		C.	y = –3x – 1	D.	y = 4x
		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 graph that is nonlinear.
		A.		B.
		C.		D.
		Hint
	5.	Find the equation that is nonlinear.
		A.	y = 4y2	B.	y = 8 – x
		C.	y = 14 + 6x	D.	y = –3x – 1
		Hint