Function Notation in Context

what is function notation?

• adding functions.

• i wasn't listening

• the way an equation (function) is written.

• pass.

How would you write y = 2x - 3 in function notation?

• y = 2x-3

• f = 2x - 3

• f(x) = 2x-3

How do you read f(x)?

• f times x

• f of x

• f parenthesis x

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

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

If I know that f(2) = 4, what is another way I can write my answer?

• 2,4

• (2, 4)

• That is the only way to write it.

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

• f(-1) = 5

• f(-1) = -5

• f(-1) = -12

• f(-1) = -10

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

• 6
• 7
• 8
• 9

Evaluate f(2):

f(x)=3x+1

• 7

• 9

• 11

• 13

If g(x)=2x+5, what is the value of g(4)?