Relations and Functions Answers

Domain: {–1}{–1, 2, 4, 5}✔ {–3, –1, 1}{–3, –1, 1, 2, 4, 5}

What is the range of the relation? ✔ 46-4-6

Domain: {–2, –1, 0, 2, 3, 4}✔ {–2, –1, 0, 4}{–2, 2, 3, 4}

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

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

−4 ___(a)___ x ___(b)___ 4

What is the domain of the relation? X -64✔ -46

The set of ordered pairs above: ✔ functionnot a function

What does the notation f(0) mean? Multiply f by 0✔ the output (y-value) when x = 0the value of x when the output is 0

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

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

This relation is ✔ not a functiona function.

Which ordered pairs prevent this relation from being a function?

The mapping diagram above: ✔ functionnot a function

f(0) =

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

Create your own real-world example of a relation that is a function. Domain: The set of Range: The set of

Suppose that you could replace the ordered pair (1, 4) to make the relation R (shown left) into a function. Which ordered pair would work?

Use the drop downs to determine which symbols would complete the inequality for the range.