Function Notation Applications

The speed of the baseball is a function of the time since the baseball was hit by a bat. What does f(2) = 80 represent in this situation?

• After 2 seconds the baseball is traveling at 80mph

• After 80 seconds the baseball is traveling at 2mph

• The baseball traveled 80mph for 2 seconds

• The baseball traveled 2mph for 80 seconds

The height of a plant, in inches, is a function of the time it takes to grow, measured in weeks. What does the notation h(10) represent?

• The plant is 10 inches tall.

• The height of the plant after 10 weeks.

• The plant stopped growing after 10 weeks.

• The time it took the plant to grow its tallest.

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.

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

• -1

• 1

• 5

• -5

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

Mathematical Equivalence

ON

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

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

How do you read f(x)?

• "f x"

• "f of x"

• "f parenthesis x"

• "f with an x inside parenthesis"

f(x) is the same thing as ______.

• y

• x

• input

• an equation