1.	Which is the graph of y = 2.5x?
		A.		B.
		C.		D.
		Hint
	2.	Use a graph in order to approximate .
		A.	133.4	B.	112.6
		C.	0.0045	D.	0.0089
		Hint
	3.	A guest on a talk show tends to receive many phone calls right after she is on the show, and then the calls become less frequent. This can be represented by the equation y = 30(0.92)d, where y is the number of phone calls after d days. How many phone calls should she expect after a week?
		A.	17	B.	23
		C.	2	D.	28
		Hint
	4.	A guest on a talk show tends to receive many phone calls right after she is on the show, and then the calls become less frequent. This can be represented by the equation y = 20(0.53)d, where y is the number of phone calls after d days. On what day should she expect to have 3 calls?
		A.	10	B.	2
		C.	3	D.	15
		Hint
	5.	Use a graph to approximate 31.2.
		A.	0.27	B.	3.7
		C.	3.12	D.	5.4
		Hint