1. CHAPTER 4 TEST REVIEW v
Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7 Question 8 Question 9 Question 10
Question 11 Question 12 Question 13 Question 14 Question 15 Question16 Question 17 Question 18 Question 19 Question 20

2. Question 1
Eric competes in jump rope competitions. His average is 125 jumps per minute. Write an equation, make a table and graph this situation.
ANSWER

3. Question 2
The number of trees saved by recycling paper is shown. Write an equation and use the equation to find how many trees could be saved if 500 tons of papers are recycled.
ANSWER

4. Question 3
Write a real-world equation with two variables.
ANSWER

5. Question 4
If a coordinate point with a negative x-value, and a negative y-value was graphed, what quadrant is the point located?
ANSWER

6. Question 5
Describe the difference between domain and range.
ANSWER

7. Question 6
Express this relation in a table and graph. {(6, 2), (-1, 3), (4, -3)}
ANSWER

8. Question 7
Write an equation with an independent variable, dependent variable, and a constant.
ANSWER

9. Question 8
Find f(5) if f(x) = 3x + 6
ANSWER

10. Question 9
How do you know how to choose numbers that make sense for the domain and range?
ANSWER

11. Question 10
Write an equation for the following situation. A hot air balloon can hold 90,000 cubic feet of air. It is being inflated at a rate of 6,000 cubic feet per minute. The total cubic feet of air a(t) is a function of the time in minute t.
ANSWER

12. Question 11
Graph functions y = x – 5 and y = 2x + 7
ANSWER

13. Question 12
One store sells pear for $5.75 per pound and the other sells pear at a constant rate with points of (2, 11.90) and (3, 17.85). Compare the rates of the two stores.
ANSWER

14. Question 13
A family drove to an amusement park for a vacation. After that they averaged 200 miles per day for 8 days. They drove a total of 1,880 miles over six days. Assume the relationship is linear. Find and interpret the rate of change and initial value.
ANSWER

15. Question 14
Describe the difference between a linear and a nonlinear function.
ANSWER

16. Question 15
Graph y = 0.5x2 + 3
ANSWER

17. Question 16
Tamie rides her bike at a steady rate. She coast downhill which increases her speed at increasing rates. Sketch a qualitative graph from this situation.
ANSWER

18. ANSWER Question 17 A ____________ is any set of ordered pairs.
The variable for the range is called the ____________________________ because it depends on the domain.
ANSWER

19. Question 18
Graphs used to represent situations that may not have numerical values or graphs with numerical values are not included are called __________________________________
The variable for the domain is called the ______________________________ because it can be any number.
ANSWER

20. Question 19
_________________________ can take on any value, so there is no space between data values for a given value.
A function in which the greatest power of the variable is 2 is called a ____________ __________________.
ANSWER

21. Question 20
A _________________ is a relation in which every member of the domain (input values) is paired with exactly one member of the range.
ANSWER

22. y = 125x
Answer to Question 1 x y -2
-250 2
250
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23. y = 17x
8500 tons
Answer to Question 2
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24. (This is just an example)
The equation
y = 14x represents the amount of money I will have after x weeks if I save $14 a week.
Answer to Question 3
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25. Answer to Question 4 Quadrant 3
Wondering why? Click on the question mark.
Answer to Question 4
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26. Answer to Question 5 Domain describes the independent variable (x).
The range describes the dependent variable (y).
Answer to Question 5
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27. x y 6 2 -1 3 4 -3
Answer to Question 6
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28. Answer to Question 7 (This is only an example) y = 6x
y = dependent variable
x = independent variable
6 = constant
Answer to Question 7
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29. 21
Answer to Question 8
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30. Answer to Question 9 BACK TO QUESITON
Numbers that make sense for the domain and range are the same numbers that make sense logically for the situation. For example, you need to use whole numbers when describing items or people, while you can have decimals when talking about money or weight.
Answer to Question 9
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31. a(t) = 6000t
Answer to Question 10
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32. y = x - 5
Answer to Question 11
y = 2x + 7
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33. Answer to Question 12 One store has a rate of $5.75 per pound.
The other store has a rate of $5.95 per pound.
Answer to Question 12
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34. Interpretation = The family drove 200 miles per day
rate of change = 200
Interpretation = The family drove 200 miles per day
Initial value = 680
Answer to Question 13
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35. A linear function has a rate and looks like a straight line.
A nonlinear function is a curve. A rate does not exist.
Answer to Question 14
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36. Answer to Question 15
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37. Answer to Question 16
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38. relation
dependent variable
Answer to Question 17
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39. Answer to Question 18 qualitative graphs independent variable
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40. Continuous
quadratic function
Answer to Question 19
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41. Answer to Question 20
function
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42. VOCABULARY Relation Function continuous data dependent variable,
independent variable
quadratic function
qualitative graph
linear
Nonlinear
Range
domain