1.	Determine which equation represents a function.
		A.	x = y2 - 1	B.
		C.	x = 4	D.	y = -2x + 1
		Hint
	2.	Which function is not linear?
		A.	f(x) = 2x3	B.
		C.	f(x) = 14x + 7	D.	f(x) = 8
		Hint
	3.	Find the y-intercept of the graph of 2x - 5y = 10.
		A.	5	B.	2
		C.	-2	D.	0
		Hint
	4.	Given find ?
		A.	10	B.	–9
		C.	–12	D.	9
		Hint
	5.	Given find
		A.	–7	B.	–1
		C.	1	D.	7
		Hint