Function Notation Lesson

Multiple Choice

If a question asks you to find f(2), what does that mean?

• Let x = 2

• Let y = 2

Multiple Choice

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

• Plug a 1 in for all the x's

• Set the function equal to 1

• Only plug a 1 into the left side

• Only plug a 1 into the right side

Multiple Choice

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

• f(1) = 1

• f(1) = 4

• f(1) = 0

• f(1) = 3

Multiple Choice

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

• (4, 1)

• (4, 33)

• (4, 15)

• (4, -7)

Multiple Choice

g(x) = 3x + 1
g(2) = _______

• 6

• 7

• 8

• 9

Multiple Choice

f(x) is the same thing as ______.

• y

• x

• input

• an equation

Multiple Choice

_{Using the graph, what does f(8) equal?}

• 8

• 2

• 1

• 0

Multiple Choice

For what value of t is H(-6) ?

• 0

• 5

• 2

• 7

Multiple Choice

Complete the function notation below
f(____) = 214

• 1990

• 1991

• 1989

• 1994

Multiple Choice

f(8) = 12
Convert to coordinate point.

• (8, 12)

• (12, 8)

Multiple Choice

g(-1) = 15
Convert to a coordinate point.

• (15, -1)

• (-1, 15)

Multiple Choice

The function c(m) = 1.45m + 3.50 represents the cost of a taxi for m miles.
What does c(7) represent?

• A cost of $7 to ride the taxi

• The cost to ride 7 miles

• The minimum distance to ride a taxi

• The minimum cost of a taxi

Multiple Choice

The function h(t) represents the height in inches of a plant after t weeks. What does the notation h(4) = 5 mean?

• After 5 week the plant is 4 inches tall

• The plant grows at a rate of 5/4 inch per week

• After 4 weeks the plant is 5 inches tall

• The plant grows at a rate of 1 inch per week

Multiple Choice

Derek works at Subway making $9.25 an hour.  The function d(x)=9.25x tells us how much money Derek makes after x hours of working.  What is the meaning of d(4)=37?

• After 4 hours of work, Derek makes $37.

• Derek needs $4 more to have $37 total.

• After working for 4 days, Derek makes $37 total.

• After 4 hours of work, Derek now makes $37 an hour instead of $9.25.

Time for Independent Practice

Multiple Choice

If a question asks you to find f(2), what does that mean?

• Let x = 2

• Let y = 2

Multiple Choice

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

• Plug a 1 in for all the x's

• Set the function equal to 1

• Only plug a 1 into the left side

• Only plug a 1 into the right side

Multiple Choice

If f(x) = 2x+1, what would the function look like once you substitute in a 1 to find f(1)?

• f(x) = 21+1

• f(1) = 2 (1) + 1

• f(1) = 2x (1) + 1

Multiple Choice

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

• f(1) = 1

• f(1) = 4

• f(1) = 0

• f(1) = 3

Multiple Choice

g(x) = 3x + 1
g(10) = ______

• 14
• 31
• 15
• -31

Multiple Choice

f(x) = x-5 find f(-2)

• -7

• 3

• 7

• -3

Multiple Choice

f(x) = x+7 find f(1)

• 5

• 6

• 7

• 8