Name ____________________________Period: ________Date: ________
Section 6.1: Functions Homework
Graph each relation. Is each relation a function? Explain why or why not.
1.
x
-4
-2
0
2
y
4
2
0
-2
Function? _________
Explanation using vocabulary from notes:
________________________________
________________________________
2.
x
2
-4
-2
3
y
-4
0
3
-4
Function? _________
Explanation using vocabulary from notes:
________________________________
________________________________
3.
x
-5
-3
1
3
y
-5
-3
1
3
Function? _________
Explanation using vocabulary from notes:
________________________________
________________________________
4.
Function? _________
Describe the pattern for the inputs & outputs:
________________________________
________________________________
For each relation, list the members of the domain. List the members of the range.
Is the relation a function? Explain.
5. {(7, -2), (8, -2), (-5, 7), (-9, 1)}
Domain: __________________
Range: _________________
Function? ___________
Explanation:
_______________________________________________________________
_______________________________________________________________
6. {(-8, 0), (10, 6), (10, -2), (-5, 7)}
Domain: __________________
Range: _________________
Function? ___________
Explanation:
_______________________________________________________________
_______________________________________________________________
Real Life Situation:
7.) A store sells previously viewed movies. The table shows the cost of buying
1, 2, 3, or 4 movies.
a.) Is the relation a function? Explain.
b. Describe the pattern. How much does the cost per movie change as you buy more
movies?
ANSWERS:
1.) Function, every domain is paired up with exactly one range.
2.) Function, every domain is paired up with exactly one range.
3.) Function, every domain is paired up with exactly one range.
4.) Function, every domain is paired up with exactly one range.
5.) Domain: -9,-5, 7, 8 Range: -2, 1 , 7
Function, every domain is paired up with exactly one range.
6.) Domain: -8, -5, 10
Range: -2, 0 , 6, 7
Not a function, domain of 10 is paired up with -2 and 6.
7.) a.) Function, every movie is paired up with exactly one
amount.
b.) the more movies you buy the save $2.00