Name______________________Class____________Date________
1 Hector types at a rate of 40 words per
minute. The equation w 5 40m describes the
relationship between w, the number of words
he types, and m, the number of minutes he
spends typing. Which statement is true?
A The rate at which Hector types depends
on the number of minutes he spends
typing.
4 An overnight shipping company charges a
flat fee of $10.00, plus $0.50 for every ounce
the package weighs, and an additional $0.10 per mile of shipment. The price of a shipment can be expressed by the function P 5 10 1 (0.5)w 1 (0.1)d, where w is the
weight in ounces, d is the distance in miles,
and P is the price. Which statement is true?
B The number of minutes he spends typing
depends on the number of words he types.
F The flat fee depends on the total price.
C The number of words he types depends on
the number of minutes he spends typing.
H The distance depends on the weight.
D The rate at which Hector types depends
on the number of words he types.
2 Blaine earns $6 each hour he works at a
taco stand. If h is the number of hours he
works, and p is the total amount of money
he makes, what is true about the relationship
between h and p?
F h depends on p.
G P is an independent quantity.
J w is an independent quantity.
5 Agam pays a $10 membership fee to a gym
each month, plus $2 for each visitor he brings
with him to the gym. If c is the total amount
Agam spends at the gym, and v is the
number of visitors he brings, the relationship
between the two variables is c 5 10 1 2v.
Which statement is true?
A The monthly fee is the only independent
variable.
G h is an independent variable.
H p is an independent variable.
B The number of visitors depends on the
total cost.
J Blaine’s hourly rate depends on p.
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C The cost is the dependent variable.
3 At her job, Mirta washes 8 cars each hour.
The relationship between the number of
cars she washes, w, and the number of hours
spent washing, h, is described by the function
w 5 8h. Which statement is true?
D The number of visitors depends on the
monthly fee.
A The amount of hours Mirta works depends
on the number of cars she washes.
B The amount of money Mirta earns
depends on the number of cars she washes.
C The number of cars Mirta washes depends
on the number of hours she works.
D The number of cars Mirta washes per
hour depends on the number of hours she works.
STAAR Algebra I EOC Assessment Practice
LESSON 1 ■ Independent and Dependent Quantities in Functions 3
Name______________________Class____________Date________
1 Find the domain and range of the function
graphed below.
8
y
6
20
Juice Left (gallons)
Bacteria (thousands)
y
3 Ms. Drazi bought 25 gallons of cranberry
juice for the juice machine at her office. The
graph below shows how much juice was left
over time.
4
2
O
2
4
6
8
x
Time (days)
15
10
5
O
A Domain: 0 # x # 4; Range: 0 # y # 4
B Domain: 0 # x # 8; Range: 0 # y # 4
C Domain: 0 # x # 4; Range: 0 # y # 8
D Domain: 0 # x # 8; Range: 0 # y # 8
2
4
6
8
x
Time (days)
What is the domain of this function?
A 0 , x , 10
B 0 , y , 10
C 0 # x # 10
D 0 # y # 10
2 The graph below shows the temperature
recorded at a weather station during a period of several months. Which inequality
best approximates the range of the function?
Temperature ( F)
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80 y
4 Determine the domain and range of the
function graphed below.
60
4
40
O
y
2
4
8
12
16
x
240
–4
–2 O
2
4x
–2
260
Time (months)
–4
F 0 # x # 20
F Domain: 23 # x # 3; Range: 21 # y # 3
G 0 # y # 20
G Domain: 23 # x # 3; Range: 0 # y # 3
H 20 # x # 80
H Domain: 0 # x # 3; Range: 21 # y # 3
J 20 # y # 80
J Domain: 21 # x # 3; Range: 23 # y # 3
STAAR Algebra I EOC Assessment Practice
LESSON 7 ■ Identifying and Determining Domains and Ranges 21
Name______________________Class____________Date________
1 Which of these scatter plots shows a negative
correlation?
A
3 Describe the relationship between the
average June temperatures and the latitude
positions of cities on the scatter plot below.
y
x
O
Average June
Temperature (°F)
y
80
65
40
20
20 40 60 80 x
Latitude
O
B
y
A The temperatures are about the same
at all latitudes.
B The lower the latitude, the lower the
temperature.
x
O
C
D
x
4 The scatter plot below shows the relationship
between the ages of various cars of the same
model and their values.
y
O
x
2 Tina records the ages and weights of
12 children in her neighborhood. If she
records this data in a scatter plot, what type
of relationship will she most likely see?
F Positive correlation
G Negative correlation
H No correlation
Car Value
(thousands of dollars)
Copyright © Pearson Education, Inc., or its affiliates. All rights reserved.
D The higher the latitude, the higher the
temperature.
y
O
C The higher the latitude, the lower the
temperature.
25 y
20
15
10
5
O
2 4 6 8 x
Age of Car (years)
Approximately how much should you expect
to pay for a 6-year-old car?
F $5,000
G $10,000
H $15,000
J $20,000
J Constant correlation
STAAR Algebra I EOC Assessment Practice
LESSON 9 ■ Organizing and Interpreting Data 27