Casio ED-WKBK-PRECALC Datasheet download pdf (Page 7)

6. Enter the data into the calculator and determine the linear function.

List 1 List 2

0 8

2 6

5 3

2 0

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7. Lauren works as a babysitter to earn some extra money. She charges her

customers seven dollars an hour. Write a function to determine the amount

of money Lauren will earn if she works x hours. How much money will she

earn if she works 4 hours? 7 hours? 11 hours?

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8. A cell phone company charges its customers $30 per month for phone calls

plus an additional charge of seven cents per text message after the first 50

text messages. Write a function that accurately models how much money

you will spend per month with this plan. How much money will you spend if

you send 50 text messages per month? 100 text messages per month? 225

text messages per month? 500 text messages per month?

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Extension

1. Create a data set that models a function which is non-linear.

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2. Write a non-linear function and evaluate that function where -5 <

x < 5.

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Activity 4 • Algebra I with the Casio fx-9750GII

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Casio ED-WKBK-PRECALC Datasheet Page 7