7
lesson pretestMultiple Choice

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Question 7 • Algebra 2

Which graph represents the solution of the fraction with numerator open paren y plus 2 close paren squared and denominator 4 plus the fraction with numerator open paren x minus 3 close paren squared and denominator 9 is less than 1 and y is less than or equal to square root of x minus 1 end root minus 4 ?

Answer
A
Image with description On a coordinate plane, an ellipse has center (3, negative 2) and goes through (3, 1), (5.5, negative 2), (3, negative 5), and (0.5, negative 2). A curve starts at (1, negative 4) and goes up through (2, negative 3) and (11, negative 1). Everything inside of the ellipse and below the curve is shaded.
B
Image with description On a coordinate plane, an ellipse has center (3, negative 2) and goes through (3, 0), (6, negative 2), (3, negative 4), and (0, negative 2). A curve starts at (1, negative 4) and goes up through (2, negative 3) and (11, negative 1). Everything inside of the ellipse and above the curve is shaded.
C
Image with description On a coordinate plane, an ellipse has center (3, negative 2) and goes through (3, 1), (5.5, negative 2), (3, negative 5), and (0.5, negative 2). A curve starts at (1, negative 4) and goes up through (2, negative 3) and (11, negative 1). Everything inside of the ellipse and above the curve is shaded.
D
Image with description On a coordinate plane, an ellipse has center (3, negative 2) and goes through (3, 0), (6, negative 2), (3, negative 4), and (0, negative 2). A curve starts at (1, negative 4) and goes up through (2, negative 3) and (11, negative 1). Everything inside of the ellipse and below the curve is shaded.

Explanation

The ellipse inequality has center (3, −2). Its horizontal radius is 3, from the denominator 9, and its vertical radius is 2, from the denominator 4, so its intercepts are (0, −2), (6, −2), (3, 0), and (3, −4). Because the ellipse inequality is strict, the solution is inside the ellipse. The other inequality says y is less than or equal to the curve, so the solution is below it. Choice D shows both conditions.

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