Name: _________________________________ Domain and Range

© Region 4 Education Service Center Supporting STAAR™ Achievement: Algebra I All rights reserved.

Evaluate: Domain and Range 1. Kiera was driving in her neighborhood and approached a stop sign. When she applied the

brakes, it took 4.5 seconds to come to a complete stop from a speed of 20 miles per hour. If Kiera creates a graph of her speed versus time as she applies the brakes, which of the following would describe the domain for her graph?

A 0 20x≤ ≤

B 0 4.5x≤ ≤

C 0 20y≤ ≤

D 0 4.5y≤ ≤

2. The graph below shows the height of a ball thrown from the top of a building. Which inequality

best describes the range of the graph?

Hei

ght

(fee

t)

Time (seconds)

A 0 4.4x≤ ≤

B 0 95x≤ ≤

C 0 4.4y≤ ≤

D 0 95y≤ ≤

Domain and Range

© Region 4 Education Service Center Supporting STAAR™ Achievement: Algebra I All rights reserved.

3. The graph below shows the total cost of parking in a downtown garage. Which of the following describes the range of the graph?

Tota

l Cos

t ($

)

Months

A {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}

B {50, 100, 150, 200, 250, 300, 350, 400, 450}

C {105, 2, 135, 4, 195, 5, 225, 8, 315, 9, 345, 11, 405}

D {105, 135, 165, 195, 225, 255, 285, 315, 345, 375, 405}

4. The graph below shows the height of a rocket launched from the ground. Which inequality best

describes the domain of the graph?

Hei

ght

(fee

t)

Time (seconds)

A 0 10x≤ ≤

B 0 400x≤ ≤

C 0 10y≤ ≤

D 0 400y≤ ≤

Name: _________________________________ Making Predictions from Scatterplots

© Region 4 Education Service Center Supporting STAAR Achievement: Algebra 1 All rights reserved.

Evaluate: Scatterplots 1. A scatterplot shows the number of miles driven versus the gallons of gasoline remaining in the

gas tank of a car. Which correlation best describes the relationship shown on the scatterplot?

A Constant correlation

B Positive correlation

C Negative correlation

D No correlation

Gallons of gasoline

Mile

s dr

iven

Making Predictions from Scatterplots

© Region 4 Education Service Center Supporting STAAR Achievement: Algebra 1 All rights reserved.

2. Shelia collected data on ticket sales for the homecoming dance.

Ticket Sales

Num

ber

of T

icke

ts S

old

Day Number of Ticket Sales

If she plots the data on the scatterplot shown above, which equation best models the trend line for this data?

A 9 242

y x

B 9 242

y x

C 2 249

y x

D 2 249

y x

Making Predictions from Scatterplots

© Region 4 Education Service Center Supporting STAAR Achievement: Algebra 1 All rights reserved.

3. Students in a group of chess teams submitted data about hours of team practice and the number of matches the team won. The graph shows the results of the data. Based on the data, if a team practices 4.5 hours per week next year, which is the best estimate of the number of chess matches a team could expect to win?

Chess Team Practice

Mat

ches

Won

Hours of Weekly Practice

A 22

B 19

C 14

D 12

Making Predictions from Scatterplots

© Region 4 Education Service Center Supporting STAAR Achievement: Algebra 1 All rights reserved.

4. The scatterplot below shows the algebra grades and the number of absences of different students for the first semester.

Algebra Grades

Alg

ebra

Gra

des

Number of Absences

Which of the following is the best interpretation of this scatterplot? A As the number of absences increase, algebra grades stay the same.

B Students who have fewer absences seem to have higher algebra grades.

C Students who have the most absences seem to have higher algebra grades.

D As the number of absences decrease, algebra grades stay the same.

Name: ________________________________ Factoring Trinomials

© Region 4 Education Service Center Supporting STAAR™ Achievement: Algebra 1 All rights reserved.

Evaluate: Factoring Trinomials 1. The area of a rectangular rug can be expressed as 2 3 10x x− − square units. If the length is

x – 5 units, what is the width? A x + 5 units B x + 2 units

C x – 2 units

D x – 3 units

2. The trinomial 22 3x x+ − is modeled below.

What is the factored form of 22 3x x+ − ? A ( 1)(2 3)x x− − B ( 1)(2 3)x x+ −

C ( 1)(2 3)x x+ +

D ( 1)(2 3)x x− +

3. Which of the following expressions is equivalent to 2 5 24x x− − ? A ( 3)( 8)x x− + B ( 3)( 8)x x− −

C ( 3)( 8)x x+ −

D ( 3)( 8)x x+ +

Key

x2 –x2

x –x

–1 1

Factoring Trinomials

© Region 4 Education Service Center Supporting STAAR™ Achievement: Algebra 1 All rights reserved.

4. The area of a rectangular region can be expressed as 2 5 84x x+ − square units. If the width is x + 12 units, what is the length?

A x – 12 units B x + 17 units

C x – 7 units

D x + 7 units

Name ________________ On You Own Domain and Range

1. 2.

Domain _________________ Domain _________________

Range _________________ Range _________________

3. 4.

Domain _________________ Domain _________________

Range _________________ Range _________________

5. 6.

Domain _________________ Domain _________________

Range _________________ Range _________________

7. 8.

Domain _________________ Domain _________________

Range _________________ Range _________________

9. John rides his bicycle 12 miles per hour on the trail. The trail is 24 miles long. Answer the following questions about this situation. A) Circle One: Discrete or Continuous B) Domain _________________ Range _________________