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  1. AP Pre Calculus
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Polynomial and Rational Functions

Question 1
college-boardPre-CalculusAPExam Style
1 mark

If the cost per unit, c(x), to produce x items is modeled by the rational function c(x)=5000x+10c(x) = \frac{5000}{x} + 10c(x)=x5000​+10, at what quantity of items does producing one more item decrease the cost by exactly $5?

Question 2
college-boardPre-CalculusAPExam Style
1 mark

Which feature does NOT represent a characteristic of rational functions?

Question 3
college-boardPre-CalculusAPExam Style
1 mark

Given a rational function used to model population dynamics, P(t)=200tt2+9P(t) = \frac{200t}{t^2+9}P(t)=t2+9200t​, what is the limit of P(t)P(t)P(t) as ttt approaches infinity?

Question 4
college-boardPre-CalculusAPExam Style
1 mark

What is the simplified form of the rational expression x2−4x+2\frac{x^2 - 4}{x + 2}x+2x2−4​?

Question 5
college-boardPre-CalculusAPExam Style
1 mark

How do you identify a hole in the graph of a rational function?

Question 6
college-boardPre-CalculusAPExam Style
1 mark

What happens to values of F(X)=X+15(X−11)2F(X)=\frac{X+15}{(X-11)^2}F(X)=(X−11)2X+15​ as X approaches 11 from the right?

Question 7
college-boardPre-CalculusAPExam Style
1 mark

A rational function has a removable discontinuity; if one occurrence each of its factors in both its numerator and denominator are removed, what remains are monic linear factors—what was one possible initial expression for this rational function?

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Question 8
college-boardPre-CalculusAPExam Style
1 mark

What characteristic in the graph of the rational function defined by g(x)=(x+5)(x−3)(x+5)(x−7)g(x)=\frac{(x+5)(x-3)}{(x+5)(x-7)}g(x)=(x+5)(x−7)(x+5)(x−3)​ indicates there is a hole rather than an asymptote at x=−5x=-5x=−5?

Question 9
college-boardPre-CalculusAPExam Style
1 mark

What horizontal asymptote, if any, does f(x)=x3+x2+6xx2−x−6f(x)=\frac{x^3+x^2+6x}{x^2-x-6}f(x)=x2−x−6x3+x2+6x​

Question 10
college-boardPre-CalculusAPExam Style
1 mark

In what way would replacing 'x' with '-x' in both parts of R(x)=ax+bcx+dR(x)=\frac{ax+b}{cx+d}R(x)=cx+dax+b​ have an effect on its symmetry properties?