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# Unit A Concepts 6-7: Linear Models and Profit, Revenue, Cost problems

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Author: Crystal Kirch
##### Description:

Writing linear models and evaluating for word problems

Writing and solving Cost, Profit, and Revenue word problems
(more)

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Tutorial

## Who loves Word Problems?

If you do, then give me a chuckle and continue right on!

If you don't, then give me a great big smile and continue right on!

Concepts 6-7 are your first two word problems for Math Analysis.  One of the things we love to do with word problems besides solve them is WRITE OUR OWN.  This helps us to see if we really get the components of the word problem, and it's quite fun and creative.

To remind you:

Even though you may be saying, "Oh yeah, I got this"... PLEASE PLEASE PLEASE make sure to FULLY understand the details of this concept. It's MORE than just solving the problems in Math Analysis...

YOU MUST BE ABLE TO SOLVE, EXPLAIN YOUR THOUGHT PROCESSES, AND MAKE CONNECTIONS among these concepts that you have seen as "so easy" in the past.

Start yourself on the right path by taking even these "easy concepts" seriously!

## Unit A Concept 6 - Part 1

In this lesson, learn what a linear model is and how to take information from a word problem and set up a linear model. In addition, we will be able to extrapolate data from the equation we write in order to predict the future.

Source: Created by Crystal Kirch using Camtasia for Mac

## Unit A Concept 7 - INTRO

This video will cover all the vocabulary associated with Profit, Revenue, Cost problems and explain how to tell the difference between all of the numbers in the problem.

Source: Created by Crystal Kirch using Camtasia for Mac

## Unit A Concept 7 - Part 1

This video will go over three examples of Profit, Revenue, Cost problems. Remember, if you understand how to do the problems, just check the answers at the end of each problem throughout the video and move on. If you are stuck, listen carefully step by step.

Source: Created by Crystal Kirch using Camtasia for Mac

## SSS Requirements

Before moving on, please make sure the following problems from your SSS are complete and correct, as based on what I went over in the video.

Page 7 #2-4

Page 8 #2,3, and the un-numbered one.

## Practice Quiz (PQ) requirements

Before moving on, please complete the following PQ problems on your own.

• These problems must be done on lined paper and labeled clearly with “Unit ___ Concept ___ Practice Quiz” at the top of each page.  PLEASE HIGHLIGHT THIS TITLE SO IT IS VERY CLEAR WHERE ONE ASSIGNMENT STARTS AND ENDS.
• You must show all work, all steps, and all thought processes for these assignments.  If you feel like you don’t need to show any work, you must explain your thought process in a few sentences.  No step by step work = no credit.
• You must check your answers to the PQ problems (answers are on the last page of each SSS packet) and re-work through any problems you got wrong.

You must MASTER this material, so if you are getting them wrong, you need to figure out how to do them correctly.  Please contact me if you have a question (you can add a question at the end of this tutorial) and I can work out another example video for you.

​PQ 6 #1-2

​PQ 7 #4-5

## Unit A Reflection (Concepts 6-7)

Please answer questions posed below correctly and completely.

You MUST re-watch the video if you don't know the correct answer.

Completely means:
1) Complete sentences