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Function Project. Taylor Knighton Date: 9/20/2010. My real world proble m. Lizzy and her friends went to Best Buy, to buy some CD’s it was 3 for 24.00 How much would it be if she bought 5. My Equation. Y = 8x ( 1, 8 ) ( 2, 16 ) ( 3, 24 ) ( 4, 32 ) ( 5, 40 ). Variables.

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Function Project.

Taylor Knighton

Date: 9/20/2010


My real world problem

Lizzy and her friends went to Best Buy, to buy some CD’s it was 3 for 24.00 How much would it be if she bought 5.


My Equation

Y = 8x

( 1, 8 )

( 2, 16 )

( 3, 24 )

( 4, 32 )

( 5, 40 )


Variables

  • Independent variables- The independent variable is X which is the number of CD’s

  • Dependent variables- The dependent variable is Y which is the amount it cost

  • Y depends on X

  • Yes, it is a function


Domain & Range

Domain- all the X values

(1, 2, 3, 4, 5)

Range- all the Y values

(8, 16, 24, 32, 40)


Is it continuous or discrete?

Discrete, because that’s as far as you need to go to answer the question.


The stated equation& function notation

Equation;

X 8 = Y

Notation;

F(x)=40(x)


Table.

.

.

.

.

.


Graph.

.

40

36

32

.

28

.

24

20

16

.

12

.

8

4


Explanation

Every CD cost 8 dollars a piece,

& since I want 5 CD’s it will cost 40 dollars total.

& that is my real world problem :)

.

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.

24.00$ 3 = 8.00$

8.00$ 5 = 40.00$

X


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