Mathematics B - Regents High School Examination - The University Of The State Of New York - 2009 Page 7

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18 The accompanying graph illustrates the presence of a certain strain of
computations.
bacteria at various pH levels.
70
60
50
40
30
20
10
0
4
5
6
7
8
9
10
pH
What is the range of this set of data?
(1) 5
x
9
(3) 0
y
70
(2) 5
x
70
(4) 5
y
70
19 Juan has been told to write a quadratic equation where the sum of the
roots is equal to −3 and the product of the roots is equal to −9. Which
equation meets these requirements?
+ 3x + 9 = 0
+ 6x − 18 = 0
2
2
(1) x
(3) 2x
− 12x + 27 = 0
(4) (x + 3)(x + 9) = 0
2
(2) x
[7]
[OVER]
Math. B – Jan. ’09

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