Mathematics B Regents High School Examination - The University Of The State Of New York, 2003 Page 7

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18 A commercial artist plans to include an ellipse in a design and wants the
Use this space for
length of the horizontal axis to equal 10 and the length of the vertical
computations.
axis to equal 6. Which equation could represent this ellipse?
2
2
2
2
(1) 9x
+ 25y
= 225
(3) x
+ y
= 100
2
2
2
(2) 9x
– 25y
= 225
(4) 3y = 20x
1
3
19 A function is defined by the equation y =
x –
. Which equation
2
2
defines the inverse of this function?
3
(1) y = 2x + 3
(3) y = 2x +
2
3
(2) y = 2x – 3
(4) y = 2x –
2
2
20 In the equation ax
+ 6x – 9 = 0, imaginary roots will be generated if
(1) –1 < a < 1
(3) a > –1, only
(2) a < 1, only
(4) a < –1
[7]
[OVER]
Math. B –Aug. ’03

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