Functions Worksheet - Big Ideas Math Prealgebra: A Florida Standards Curriculum Teaching Edition Page 15
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47Exercises
6.2
Help with Homework
1.
VOCABULARY
Identify the input variable and the output variable for the
function rule y = 2x + 5.
2.
WRITING
Describe fi ve ways to represent a function.
3.
DIFFERENT WORDS, SAME QUESTION
Which is different? Find “both” answers.
What output is 4 more
What output is twice the sum
than twice the input 3?
of the input 3 and 4?
What output is 4 increased by
What output is the sum of
2 times the input 3 and 4?
twice the input 3?
Write an equation that describes the function.
4.
Input, x
Output, y
5.
6.
Input, x
Output, y
Input, x
Output, y
0
0
1
8
1
0
1
4
− 2
2
9
3
2
8
− 4
3
10
3
12
5
4
11
− 6
7
Write a function rule for the statement.
7. The output is half of the input.
8. The output is eleven more than the input.
1
1
9. The output is three less than the input.
10. The output is the cube of the input.
11. The output is six times the input.
12. The output is one more than twice the input.
Find the value of y for the given value of x.
13. y = x + 5; x = 3
14. y = 7x; x = − 5
15. y = 1 − 2x; x = 9
2 2
x
3
16. y = 3x + 2; x = 0.5
17. y = 2x
; x = 3
18. y =
+ 9; x = − 12
—
2
Graph the function.
19. y = x + 4
20. y = 2x
21. y = − 5x + 3
3 3
x
3
22. y =
23. y =
x + 1
24. y = 1 + 0.5x
—
—
4
2
Section 6.2
Representations of Functions
253
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