Iac Function Notation

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

• y = 2x-3

• f = 2x - 3

• f(x) = 2x - 3

• Can't be written in function notation

Is the relation a function? Why?

• Yes, because the x-value 11 has two y-values paired with it.

• Yes, because each x-value has only one y-value paired with it.

• No, because the x-value 11 has two y-values paired with it.

• No, because each x-value has only one y-value paired with it.

Given the function, f, shown on the graph, what is the value of f(3)?

• 0

• 2

• 6

• 1

If f(x) = 3x - 9, find f(5).

• f(5) = 6

• f(5) = 16

• f(5) = -4

• f(5) = 24

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%

The function d(x) where x=gallons of gas and d(x)= # of miles traveled.
Interpret d(8)=300 in context.

• A car with 8 gallons of gas can travel 300 miles.

• A car traveling 8 miles has 300 gallons of gas.

• A car is traveling 300 miles.

• The car traveling 8 mph can go 300 miles.

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%

How do you read f(x)?

• "f x"

• "f of x"

• "f parenthesis x"

• "f with an x inside parenthesis"

What point is represented by g(7) = 14 ?

• (2,7)

• (7,2)

• (14,7)

• (7,14)

Find f(2)

• 5

• 4

• 3

• 0