Functions Worksheet - Big Ideas Math Prealgebra: A Florida Standards Curriculum Teaching Edition Page 16
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4725.
ERROR ANALYSIS
Describe and correct the error
✗
y
(5, 2)
in graphing the function represented by the
2
input-output table.
1
(3, 0)
1
1
1
2
3
4
5
x
1
− 4
− 2
Input, x
0
2
2
(1,
2)
− 1
Output, y
1
3
5
( 1,
4)
4 4
26.
DOLPHIN
A dolphin eats 30 pounds of fi sh per day.
a. Write and graph a function that relates the number
of pounds p of fi sh that a dolphin eats in d days.
b. How many pounds of fi sh does a dolphin eat
in 30 days?
Match the graph with the function it represents.
27.
28.
29.
y
y
y
6
5
6
5
4
5
4
3
4
3
2
3
2
1
2
1
1
2
3
4
5
x
1
1
1
2
4
5
x
1
2
3
4
5
6
x
x
y =
y = x + 1
y = − 2x + 6
—
A.
B.
C.
3
Find the value of x for the given value of y.
x
30. y = 5x − 7; y = − 22
31. y = 9 − 7x; y = 37
32. y =
− 7; y = 2
—
4
33.
BRACELETS
You decide to make and sell bracelets. The cost of
your materials is $84. You charge $3.50 for each bracelet.
a. Write a function that represents the profi t P for
selling b bracelets.
b. Which variable is independent? dependent? Explain.
c. You will break even when the cost of your materials
equals your income. How many bracelets must you
sell to break even?
34.
SALE
A furniture store is having a sale where everything is 40% off.
a. Write a function that represents the amount of discount d
on an item with a regular price p.
b. Graph the function using the inputs 100, 200, 300, 400, and 500 for p.
c. You buy a bookshelf that has a regular price of $85. What is the sale
price of the bookshelf?
254
Chapter 6
Functions
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