Functional Notation

Evaluate the function, f(x)=2x, when x=4.

• f(4) = 4

• f(4) = 2

• f(4) = 6

• f(4) = 8

Is this mapping a function or not a function? 

• Function

• Not a Function 

Evaluate f(-2) if f(x) = x+3

• -1

• 1

• 5

• -5

What is f(1)?

• 1

• 5

• 0

• 4

If g(x) = 6(-8x + 12) + 7, what is the value of g(6)?

Mathematical Equivalence

ON

Your grade in algebra class is a function of how many proficient scores you earn. This function is represented by g(x), where x represents the number of proficient scores and g(x) represents your grade percentage. Explain what g(16) = 85 means in context.

• A grade of 16 means there were 85 proficient

• If I earn 16 proficient scores then my grade will be an 85%

• g is 5.3

• If I earn 85 proficients I will get a 16%

Your grade in algebra class is a function of how many proficient scores you earn. This function is represented by g(x), where x represents the number of proficient scores and g(x) represents your grade percentage. Explain what g(16) = 85 means in context.

• A grade of 16 means there were 85 proficient

• If I earn 16 proficient scores then my grade will be an 85%

• g is 5.3

• If I earn 85 proficients I will get a 16%

Function g is defined: {(2,10),(3,12),(4,14),(5,16)}  What is the value g(4)?

• g(4) = 4

• g(4) = 16

• g(4) = 10

• g(4) = 14

Evaluate the function, f(x)=1/3x + 6, when x=3.

• y = 7

• y = 9

• y = 2

• y = 7/3

• It is a function because each x has only one y.
• It's not a function because an x has multiple y's.
• It's not a function because a y has multiple x's.
• It is a function because each y has only one x.