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function notation

Total questions: 20

Worksheet time: 2hrs 20mins

Name
Class
Date
1.
What is x if
f(x) = -2?
a)
4
b)
0
c)
3
d)
8
2.
What is f(8)? 
a)
8
b)
0
c)
3
d)
-2
3.
What is f(1)?
a)
1
b)
5
c)
0
d)
4
4.
a)

1

b)

-1

c)

19

d)

-19

5.
a)

-12

b)

-43

c)

29

d)

-29

6.
a)

16

b)

48

c)

-28

d)

4

7.
f(x) is the same thing as ______.
a)
y
b)
x
c)
input
d)
an equation
8.
f(x) = x2 + 7
x(2) = ______
a)
10
b)
11
c)
13
d)
12
9.
g(x) = 3x + 1
g(2) = _______
a)
6
b)
7
c)
8
d)
9
10.

If f(x) = 6x - 9, find f(4).

a)

(4, 1)

b)

(4, 33)

c)

(4, 15)

d)

(4, -7)

11.

If f(x) = -3x - 8, find f(-1).

a)

f(-1) = 5

b)

f(-1) = -5

c)

f(-1) = -12

d)

f(-1) = -10

12.

If f(x) = 2x + 1, find f(1).

a)

f(1) = 1

b)

f(1) = 4

c)

f(1) = 0

d)

f(1) = 3

13.

If f(x) = 2x + 1, what would be your first step to find f(1)?

a)

Plug a 1 in for all the x's

b)

Set the function equal to 1

c)

Only plug a 1 into the left side

d)

Only plug a 1 into the right side

14.

An Epidemic of influenza travels through a city. The graph is I = f(w). Where I is the number of Individuals (in thousands) infected, w weeks after the epidemic begins. Determine f(2). Check all that apply

a)

f(2) = 7

b)

f(2) = .5

c)

f(2) = 14

d)

f(2) = 8

15.
The function c(m) = 1.45m + 3.50 represents the cost of a taxi for m miles.
What does c(7) represent?
a)
A cost of $7 to ride the taxi
b)
The cost to ride 7 miles
c)
The minimum distance to ride a taxi
d)
The minimum cost of a taxi
16.
The function h(t) represents the height in inches of a plant after t weeks. What does the notation h(4) = 5 mean?
a)
After 5 week the plant is 4 inches tall
b)
The plant grows at a rate of 5/4 inch per week
c)
After 4 weeks the plant is 5 inches tall
d)
The plant grows at a rate of 1 inch per week
17.

H(2) < H(9). True or False?

a)

True

b)

False; H(2) > H(9)

c)

False; H(2) = H(9)

18.

H(2) < H(4). True or False?

a)

True

b)

False; H(2) > H(4)

c)

False; H(2) = H(4)

19.

What does f(1990)=214 mean in the context of the problem?

a)

In 1990 there were 214 million people with health insurance

b)

In 214, there were 1990 people with health insurance

c)

When there are 1990 people, the year is 214

d)

None of these

20.
Using the graph, what does f(8) equal?
a)
8
b)
2
c)
1
d)
0