1.	What is a conjecture?
		A.	an educated guess that has been proved
		B.	an educated guess that hasn't been proved yet
		C.	a ''shot in the dark'' guess that has been proved
		D.	a ''shot in the dark'' guess that hasn't been proved yet
		Hint
	2.	What are the second differences in the y-values?
		A.	2	B.	0
		C.	–1	D.	1
		Hint
	3.	Which differences are constant in a cubic equation?
		A.	fourth	B.	second
		C.	first	D.	third
		Hint
	4.	What is the relationship between constant second differences and the coefficient of the equation?
		A.	the second difference is 2 times the coefficient
		B.	the second difference is –2 times the coefficient
		C.	the second difference is opposite the coefficient
		D.	the second difference is the same as the coefficient
		Hint
	5.	How many counterexamples are needed to prove a conjecture wrong?
		A.	1	B.	2
		C.	3	D.	4
		Hint