January 8, 2013

TODAY:*WARM-UP

*REVIEW FOR TEST*APPLICATION OF

LINEAR EQUATIONS*CLASS WORK

1.Write the equation for each graph in: a) point-slope form b) slope-intercept form c) standard form

WARM-UP

2. Which graph shows the finish line of a one mile race between 2 Olympic runners? Who won?

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3.

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4.

x

y

What is the equation of the line shown?

WARM-UP5. Write the equation in standard form of a line that passes through (3,2) with a slope of 2/3.

Step 1: Rewrite in point-slope form

Step 2: Rewrite slope-intercept form into standard form.

Graph: -4x = 2y - 6 6.

WARM-UP

7.

8. If a person performs a task 99.9% of the time, how many times is the task completed for each time it is not?

PLEASE TURN TO CLASS NOTES SECTION

APPLYING GRAPHS TO REAL WORLD SITUATIONS: (ALSO KNOWN AS WORD PROBLEMS)

APPLYING LINEAR EQUATIONS

To solve a word problem, do the following: 1.Understand what you are asked to solve. 2.Determine your 2 variables; which is the independent andwhich is the dependent.

3. Write an equation in whatever form is easiest.4.Plot points, draw the line, answer the question.

APPLYING LINEAR EQUATIONS

12 a) What do the 2 variables represent? b) Label the axesc) What is the p-intercept? d) Graph the equatione) What are the coordinates at the break-even point? (Profit is zero, loss is zero) f) What is the slope of the line?

1200

600

0

-

600

-

1200

0 80 160 240 320

profit

tickets sold

APPLYING LINEAR EQUATIONS

What are you being asked to do?What are the 2 variables? Determine the independent and dependent variables

Write in slope-intercept form: y = x - 10

Determine cost of renting 15 books:

APPLYING LINEAR EQUATIONS

What are you being asked to do?What are the 2 variables? Determine the independent and dependent variables.

5 -100

APPLYING LINEAR EQUATIONS

CLASS WORK