Free Printable 4.3 HW

1.

Find the following function value.

f\left(7\right)\ if\ f\left(x\right)\ =5x

a)

12

b)

35

c)

30

d)

15

2.

Find the function value.

f\left(9\right)\ if\ f\left(x\right)=\ x+13

a)

117

b)

-4

c)

22

d)

8

3.

Find the function value.

f\left(4\right)\ if\ f\left(x\right)\ =\ 3x-1

a)

-12

b)

12

c)

10

d)

11

4.

A photographer takes an average of 15 pictures per session. The total number of pictures p(s) is a function of the number of sessions s.

a) Identify the independent and dependent variables.

a)

Independent: Number of sessions

Dependent: Total number of pictures

b)

Independent: Total number of pictures

Dependent: Number of sessions

5.

What is the independent variable?

a)

x-values

b)

y-values

6.

What is the dependent variable?

a)

x-values

b)

y-values

7.

Find the range of the function for

f\left(-3,\ -2,\ 0,\ 1\right)\ if\ f\left(x\right)=\ 6x-4

a)

-22, -16, -4, 2

b)

2, -16, 20, 22

c)

-22, -14, 5, 19

d)

2, -16, -4, 7

8.

Find the function value.

f\left(-1\right)\ if\ f\left(x\right)\ =\ 8x+15

a)

7

b)

41

c)

-41

d)

-71

9.

A photographer takes an average of 15 pictures per session. The total number of pictures p(s) is a function of the nnumber of sessions s.

a) write a function to represent the total number of pictures taken.

b)Determine the number of pictures taken in 22 sessions.

a)

$p\left(15\right)=s\ \ \ p\left(22\right)\ =\ 22\ pictures$

b)

$p\left(s\right)\ =\ 15s\ \ \ \ \ p\left(22\right)\ =\ 330\ pictures$

c)

$p\left(s\right)\ =\ 22s\ \ \ \ \ p\left(15\right)\ =\ 330\ pictures$

10.

Leo belongs to a music club that charges a monthly fee of $5, plus $0.50 per song that he downloads. Write a function to represent the amount of money m(s) he would pay in one money to download s songs. What is the cost if he downloads 30 songs?

a)

$m\left(s\right)\ =\ 5s\ +\ .50$

b)

$m\left(s\right)\ =\ 5+.50s$

c)

$m\left(s\right)\ =\ 5s\ +\ .50\ \$ $20.00

d)

$m\left(s\right)\ =\ 5+.50s$ $20.00

4.3 HW - Functions

Total questions: 10

Worksheet time: 36mins

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