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MHF4U1
RATIONAL FUNCTIONS PRACTICE TEST
Multiple Choice Identify the letter of of the choice that best completes completes the statement statement or answers the question. question.
____
1. What is the x the x-intercept -intercept of the function
?
a. x = x = 1 and x and x = 4 b. x = 1 ____
____
____
c. x = x = – 4 d. x = x = 4
2. What is the domain of the the function
?
a.
c.
b.
d.
3. What is the oblique oblique asymptote for
?
a.
c.
b.
d.
4. Which of the following following functions does not not have a vertical asymptote? asymptote? a. c.
b.
____
d.
5. Which of the following following functions does not not have a horizontal asymptote? asymptote? a. c.
b.
____
6. What are the zeros of a. b.
____
d.
? c. d.
7. Which of the following following statements is false false for the function
where both g and and h are
polynomial functions? functions? a. It is possible to have both a vertical asymptote asymptote and and a horizontal horizontal asymptote. asymptote. b. It is possible to have both both an oblique asymptote asymptote and a horizontal asymptote. asymptote. c. It is possible to have both a vertical asymptote asymptote and and an oblique oblique asymptote. asymptote. d. It is impossible impossible to have an oblique oblique asymptote, asymptote, a horizontal horizontal asymptote, asymptote, and a vertical asymptote.
____
8. What is the horizontal horizontal asymptote of
?
a. b.
____
c. d.
9. What are the vertical asymptotes asymptotes of a. b.
?
and and
c. d.
and
____ 10. Which of the following following functions has an oblique oblique asymptote? a. c.
b.
d.
____ 11. Which of the following following functions has a vertical vertical asymptote at a. c.
b.
and a horizontal asymptote asymptote of
d.
____ 12. Which equation represents represents the following graph? a.
c.
b.
d.
____ 13. What is the domain of the the following function? function?
a.
c.
b.
d.
?
____ 14. Describe the characteristics characteristics of the function
?
a. the vertical asymptote is x is x = -2 b. the horizontal asymptote asymptote is y is y = 0
c. the oblique asymptote is y is y = = x x - 2 d. there is a point discontinuity discontinuity
____ 15. For which function below below does a.
when c.
b.
?
d.
____ 16. Which function below below has no horizontal asymptote? a. c.
b.
d.
17.
Solve
4 x x
2
5x 3x 1 1
18. a) Solve using critical points x
3
4
b) Sketch the two functions and shade the area that satisfies the inequality.
19. Sketch
f ( x )
5 x 2 , showing all asymptotes and intercepts on your graph. x 3
20. a) For the function
−3 2−3 +2 − 3 +2(−5) − 5)
determine the asymptotes, domain, intercepts and
behavior as f(x) as f(x) approaches approaches the vertical asymptote b) Use the information to sketch the graph of the function.
Text book questions: Pg 309 #9 Pg 262 #1 – make make sure you can explain your answer.
Answers: 1) A 11) D
2) B 3) B 4) C 5) A 6) C 7) B 12) C 13) D 14) B 15) B 16) C