17
QuizMultiple Choice

Rational Functions — Test

Question 17 • Precalculus

f of x is equal to the fraction with numerator negative 2 x squared plus 14 and denominator x squared minus 49 Which statement describes the behavior of the graph of the function shown at the vertical asymptotes?

Answer
A
As x approaches negative 7 from the left, y approaches infinity .
B
As x approaches 7 from the right, y approaches negative infinity .
C
As x approaches 7 from the left, y approaches negative infinity .
D
As x approaches negative 7 from the right, y approaches negative infinity .

Explanation

At x = 7, the numerator approaches −2(7²) + 14 = −84, a negative number. Just to the right of 7, the denominator (x − 7)(x + 7) is positive but very close to zero, so the function approaches negative infinity. Therefore, the statement “As x approaches 7 from the right, y approaches negative infinity” is correct.

AI-written and checked against the verified answer.

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