1.	Determine the value of r so that the line through (5, 2) and (7, r) has a slope of .
		A.	1	B.	2
		C.	3	D.	6
		Hint
	2.	Determine the value of r so that the line through (r, 4) and (-7, 7) has a slope of .
		A.	-11	B.	9
		C.	3	D.	-3
		Hint
	3.	Which line has a slope of and passes through (2, -4)?
		A.
		B.
		C.
		D.
		Hint
	4.	Find the slope of the line that passes through (5, -5) and (9, -5).
		A.	0	B.
		C.	undefined	D.
		Hint
	5.	Find the slope of the line that passes through (-2, 9.5) and (4, 5).
		A.		B.	undefined
		C.	0	D.
		Hint