Linear systems unit test part 2

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 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Population 1605 1728 1776 1903 2072 2050 2141 2150 2318 2363 (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 and explain your work. (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. Answer: © 2015 K12 Inc. All rights reserved. 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. (b) Solve the system and determine how many gallons of each type of salt water the manager should combine. Show all your work. Answer: © 2015 K12 Inc. All rights reserved. Copying or distributing without K12’s written consent is prohibited. Page 2 of 2 ...