Relations and Functions

Name:

Multiple Choice
Identify the choice that best completes the statement or answers the question.

Make a mapping diagram for the relation.
{(–3, 3), (1, –6), (2, 2), (5, –5)}

a		c
b		d

Use the vertical-line test to determine which graph represents a function.

a		c
b		d

For

–19

–21

Graph the given relation or equation and find the domain and range. Then determine whether the relation or equation is a function.
(3.2, 5.2), (–1.8, 5.2), (–4.8, 3.2), (–4.8, –2.8)

a	Domain: {–4.8, –1.8, 3.2} Range: {–2.8, 3.2, 5.2} The equation is a function.	c	Domain: {–4.8, 5.2, 3.2} Range: {–2.8, 3.2, –1.8} The equation is not a function.
b	Domain: {–2.8, 3.2, 5.2} Range: {–4.8, –1.8, 3.2} The equation is a function.	d	Domain: {–4.8, –1.8, 3.2} Range: {–2.8, 3.2, 5.2} The equation is not a function.

Find the value of f(4) and g(–10) if f(x) = –8x 8 and g(x) = 2x² – 22x.

a	f(4) = –24 g(–10) = –2208	c	f(4) = 80 g(–10) = 8
b	f(4) = –40 g(–10) = 420	d	f(4) = –16 g(–10) = 102