1.	Which of the following types of functions may have a hole?
		A.	quadratic	B.	absolute value
		C.	rational	D.	square root
		Hint
	2.	Which type of function looks like a direct variation function when x > 0?
		A.	square root function	B.	absolute value function
		C.	rational function	D.	quadratic function
		Hint
	3.	When will it be true that ?
		A.	only when x is not an integer	B.	never
		C.	always	D.	only when x is an integer
		Hint
	4.	What type of function is y = 2?
		A.	constant	B.	direct variation
		C.	rational	D.	absolute value
		Hint
	5.	What type of function is the following?
		A.	direct variation	B.	rational
		C.	quadratic	D.	square root
		Hint