Mathematics B Regents High School Examination - The University Of The State Of New York, 2003 Page 3
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244 The strength of a medication over time is represented by the equation
Use this space for
–x
y = 200(1.5)
, where x represents the number of hours since the
computations.
medication was taken and y represents the number of micrograms per
millimeter left in the blood. Which graph best represents this relation-
ship?
y
y
x
x
( 1 )
( 3 )
y
y
x
x
( 2 )
( 4 )
x y
2 2
–
9
5 Written in simplest form, the expression
is equivalent to
3
–
xy
(1) –1
(3) –(3 + x y)
1
(2)
(4) 3 + x y
3 + xy
6 Which graph represents data used in a linear regression that produces
a correlation coefficient closest to –1?
y
y
x
x
( 1 )
( 3 )
y
y
x
x
( 2 )
( 4 )
[3]
[OVER]
Math. B – Aug. ’03
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