## [answered] Math | Graded Assignment | Unit Test, Part 2 | Linear Equat

Math | Graded Assignment | Unit Test, Part 2 | Linear Equations and Systems Name: Date: Graded Assignment

Unit Test, Part 2: Linear Equations and Systems

Answer the questions below. When you have finished, submit this assignment to your teacher by the due date for

full credit.

Total score: ____ of 20 points

(Score for Question 1: ___ of 10 points) 1. The table gives the population of a town for the years 2000 through 2009.

Year Popula

tion 2

0

0

0

1

6

0

5 2

0

0

1

1

7

2

8 2

0

0

2

1

7

7

6 2

0

0

3

1

9

0

3 2

0

0

4

2

0

7

2 2

0

0

5

2

0

5

0 2

0

0

6

2

1

4

1 2

0

0

7

2

1

5

0 2

0

0

8

2

3

1

8 2

0

0

9

2

3

6

3 (a) Make a scatter plot of the data, draw a line of best fit, and then find the equation of the line of best fit. Show

(b) Describe what the slope of the line of best fit represents.

(c) Use the equation to predict the population in the year 2013. Show your work.

Copying or distributing without K12?s written consent is prohibited. Page 1 of 2 Math | Graded Assignment | Unit Test, Part 2 | Linear Equations and Systems

(Score for Question 2: ___ of 10 points) 2. The manager of a fish store has water that is 10% salt and water that is 25% salt. He needs to fill an aquarium with

5 gallons of water that is 20% salt.

a Write a system of linear equations that you can use to determine how many gallons of each type of salt water

the manager should combine. Be sure to define your variables. (d) Solve the system and determine how many gallons of each type of salt water the manager should combine.

Copying or distributing without K12?s written consent is prohibited. Page 2 of 2

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