Lesson 1.1: Relations and Functions

Question 1

f(0) =

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3

Question 2

What is the special name of f(0)? the x-intercept✔ the y-intercept

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✔ the y-intercept

Question 3

The graph above: one-to-one functionfunction (but not one-to-one) ✔ relation (but not a function)

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✔ relation (but not a function)

Question 4

The graph above: ✔ one-to-one functionfunction (but not one-to-one) relation (but not a function)

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✔ one-to-one function

Question 5

What is the independent (input) variable?✔ n, the number of necklaces$6, the shipping costc, the total cost (in dollars)

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✔ n, the number of necklaces; n, the number of necklaces; c, the total cost (in dollars)

Question 6

What is the dependent (output) variable?n, the number of necklaces$6, the shipping cost✔ c, the total cost (in dollars)

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✔ c, the total cost (in dollars)

Question 7

What is the domain? n>=0✔ n=0, 1, 2, 3,...all real numbers

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✔ n=0, 1, 2, 3,...

Question 8

Which equation expresses the order’s total cost, c, as a function of the number of necklaces, n?n(c)=7c + 6n(c)=7c - 6✔ c(n)=7n + 6c(n)=7n - 6

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✔ c(n)=7n + 6

Question 9

Which expression means “the total cost, including shipping, of 5 necklaces”? n(5)✔ c(5)c(5)+6

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✔ c(5)

Question 10

This relation is ✔ not a functiona function.

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✔ not a function

Lesson 1.1: Relations and Functions Answers