6th Grade Math Textbook, Fundamentals

Lesson 13-5 for exercise sets. &KDSWHU 

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1.Bailey goes to an amusement park. The admission fee is $6. Tickets for

rides cost $5 each. One ticket is needed for each ride. Write a function to

show the total amount of money Bailey spends at the amusement park.

2.Swati starts a checking account with $100. Each month, she deposits $125

into the account. Write a function to show how much money Swati has in

her checking account in any given month.

3.Discuss and Write Explain how you found the function for exercise 1.

Evaluate the function y2.5x6 for a domain

of {2, 1, 0, 1, 2}. Then identify the range

of the function.

The range of the function y2.5x 6

for the given domain is {11, 8.5, 6, 3.5, 1}.

1

For the functiony 2 x3, find the y-values for a domain of 0, 1, and 2.

Then identify the range of the function.

The range of the function y 2 x3 for the given domain is {3, 1, 1}.

Input xy 2 x 3 Output y

0 y2(0)  3  3

1 y 2(1)  3  1

2 y2(2)  31

xy^12 x 4 y

 2 y 21 (2)  4 3

0 y^12 (0)  4 4

2 y^12 (2)  4 5

When the domain of a function is not given, the domain is considered

to be the set of real numbers.

Evaluate the function y x4 by choosing several input values,

and finding the corresponding output values of the function.

1

2

xy2.5x 6 y

 2 y2.5(2)  611

 1 y2.5(1)  6 8.5

0 y2.5(0)  66

1 y2.5(1)  6 3.5

2 y2.5(2)  61

To evaluate a function for a given domain, substitute

the given x-values into the function, and simplify.