Casio ED-WKBK-PRECALC Datasheet download pdf (Page 9)

6. This relation fails the vertical line test as evident by the two coordinates

directly above each other. Since the relation fails the vertical line test, the

relation is not a function.

7. The function is y = 7x or f(x) = 7x. If Lauren works four hours, she will earn

$28. If Lauren works seven hours, she will earn $49. If Lauren works 11 hours,

she will earn $77.

8. The function is y = .07(x - 50) + 30 or f(x) = .07(x - 50). For 50 text messages

per month, you will spend $30. For 100 text messages per month, you will

spend $33.50. For 225 text messages per month, you will spend $42.25 and

for 500 text messages per month, you will spend $61.50.

Extensions

1. Answers may vary.

2. Answers may vary.

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

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Casio ED-WKBK-PRECALC Datasheet Page 9