3.1 - 3.3 Quiz Review

1. Identify the mapping diagram that represents the relation and determine whether the relation is a

function.

{(−8, −6), (−5, 2), (−8, 1), (7, 3)}

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2.What is the graph of the function rule?

y = 3x − 1

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3. Which of the following statements is true about the graphs of f(x) = x and g(x) = f(x + 5)?

• a. g(x) and f(x) have the same y-intercept.

• b. g(x) is the graph of f(x) translated 5 units to the left.

• c. g(x) is the graph of f(x) translated 5 units down.

• d. g(x) is the graph of f(x) translated 5 units to the right.

4. Which function’s graph is a translation of the graph of

f(x) = x shifted 7 units to the left?

• a. g(x) = x − 7

• b. g(x) = −7x

• c. g(x) = 7x

• d. g(x) = x + 7

5. Which function’s graph is a translation of the graph of

f(x) = x shifted 7 units to the right?

• a. g(x) = x − 7

• b. g(x) = 7x

• c. g(x) = −7x

• d. g(x) = x + 7

6. Which of the following statements is true about the graphs of

f(x) = x and g(x) = f(8x)?

• a. The graphs of g(x) and f(x) have the same slope.

• b. The graphs of g(x) and f(x) have different y-intercepts.

• c. The graph of g(x) is less steep than the graph of f(x).

• d. The graph of g(x) is steeper than the graph of f(x).

The function f(x) is represented by the table below. What are the corresponding

values of g(x) for the transformation

g(x) = 6f(x)?

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8.Write a function for the situation. Is the graph continuous or discrete?

A movie store sells DVDs for $16 each. What is the cost, C, of n DVDs?

• a. C = 16 + n; continuous

• b. C = 16n; discrete

• c. C = 16n; continuous

• d. C = 16 + n; discrete

Identify the mapping diagram that represents the relation and determine whether the relation is a function.

{(-6,-8), (1,-8), (2,-5), (3,7)}

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The function f(x) = 3x + 10 models the amount of money Francis makes when babysitting for x hours. How much money will he make for 3 hours of babysitting work?

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• 19

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