1.	What is a conjecture?
		A.	a ''shot in the dark'' guess that has been proved
		B.	a ''shot in the dark'' guess that hasn't been proved yet
		C.	an educated guess that has been proved
		D.	an educated guess that hasn't been proved yet
		Hint
	2.	What are the second differences in the y-values?
		A.	–1	B.	2
		C.	1	D.	0
		Hint
	3.	What is true of the second differences for the equation x2 – 6x + 12?
		A.	they increase by 12
		B.	they decrease by 1
		C.	they are constant
		D.	they increase by 1
		Hint
	4.	What type of relationship does the equation have if its second differences are constant?
		A.	quadratic	B.	constant
		C.	cubic	D.	linear
		Hint
	5.	What is the relationship between constant second differences and the coefficient of the equation?
		A.	the second difference is the same as the coefficient
		B.	the second difference is opposite the coefficient
		C.	the second difference is –2 times the coefficient
		D.	the second difference is 2 times the coefficient
		Hint