1.	Which pair of lines graphed below are parallel?
		A.	l and n	B.	l and m
		C.	k and n	D.	k and m
		Hint
	2.	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 + b.
		C.	The equation has the form y = mx.
		D.	The graph does not pass through (0, 0).
		Hint
	3.	Find the graph that does not have direct variation.
		A.		B.
		C.		D.
		Hint
	4.	Michael just got a job mowing his elderly neighbor's lawn paying him $10 each week. Draw a graph showing the amount he receives is increasing very rapidly. Suppose you graph the time in weeks on the horizontal axis and the amount Michael receives on the vertical axis.
		A.		B.
		C.		D.
		Hint
	5.	Pam's mother gives Pam $20 each week for lunch to be bought at the school cafeteria. Lunches cost $4 per day. Draw a graph showing the amount Pam has left decreasing very slowly. Suppose you graph the time in days on the horizontal axis and the amount Pam has left on the vertical axis.
		A.		B.
		C.		D.
		Hint
	6.	Which three points are collinear?
		A.	(–4, 4), (0, –4), (–1, –2)
		B.	(–5, 2), (1, 1), (4, 4)
		C.	(3, –1), (2, 5), (2, –3)
		D.	(1, 2), (–3, –2), (–2, –4)
		Hint