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 = 0.8x + 9	B.	y = 4x
		C.	y = 5x + 1.3	D.	y = –3x – 1
		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.	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.	The temperature that begins at 0°F at 6:00 a.m. rises 3°F every hour for 6 hours.
		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 earned $50 mowing lawns the previous week and deposited the money in the bank.
		B.	At the beginning of the summer, Dina had $200 in the bank. She started a job and deposited $10 per week.
		C.	At the beginning of the summer, Dina had $200 in the bank. She withdrew $30 to buy a new pair of shorts.
		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 graph that is nonlinear.
		A.		B.
		C.		D.
		Hint