Fall Exam Review - Functions

1. The set of ordered pairs represents a function. Which value could NOT be the missing x-value in the last ordered pair?

• A. -3
• B. –22
• C. 1
• D. 11

2. Given the function f(x) = 7(3 – x) + 5, which of the following is a true statement?

• A. f(9) = –42
• B. f(–3) = 5
• C. f(–4) = 54
• D. f(3) = 0

3. Jill is making a rough sketch of the graph y = |x| + 4. Which of the following could be her graph?

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4. A monogramming company charges its customers per letter of monogramming in a project. The cost, c, can be represented by c = 3.75x, where x is the number of letters in the project. Which type of number is most reasonable for the domain of the situation?

• A. All integers
• B. All whole numbers
• C. All real numbers
• D. All of the above

5. Which of the following best describes the domain of the function on the graph below?

• A. –1 ≤ x ≤ –9
• B. –5 ≤ x ≤ 45
• C. –5 < x < 45
• D. –10 ≤ y ≤ 25

(a)  

7. Summer and Mia created the graphs shown. Whose graph represents a function?

• A. Summer’s graph only
• B. Mia’s graph only
• C. Both graphs represent functions
• D. Neither graph represents a function

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9. Which of the following is NOT true about f(x) = 20?

• A. The domain is x = 20.
• B. The range is y = 20.
• C. The graph of the function is a straight line.
• D. The domain is all real numbers.

10. Peter launched a water balloon from the top of a building that is 15 yards tall. The graph shows the height of the water balloon as a function of x, the distance from the building in yards. Which best represents the domain of the situation?

• A. 15 ≤ x ≤ 30
• B. 0 ≤ x ≤ 8
• C. 0 ≤ y ≤ 30
• D. All real numbers