Interpret and Evaluate Functions

• 48

• 24

• 19

• 11

The amount of ants in a colony, f, that is decaying can be modeled by                         f(x) = 800(.87)^x, where x is the number of days since the decay started. Suppose           f(20) = 49. Which of the following is true?

• After 20 days, there are 49 ants in the colony.

• After 49 days there are 20 ants in the colony.

• The amount of ants times 20 is 49.

• After 20 days the amount of ants remaining decreases by 49.

Write an equation that models the following situation:
Samantha's hair was known to grow very rapidly. It began at a length of 6 in and grew at a rate of 14% a week.

• y=6(0.14)^x

• y=6(1+14)^x

• y=6(1.14)^x

• y=6(0.86)^x

Suppose 30 flour beetles are left undisturbed in a warehouse bin. The beetle population doubles each week. What function represents this situation?

Evaluate the function for the given value: f\left(x\right)=6\ •\ 2^x for x = 3

f(x)= -7^x 
Find f(2)

• 49

• -49

• -14

• 14

Evaluate f(3)

• 0

• -1

• -8

• -30

Is this mapping a function or not a function? 

• Function

• Not a Function

The function represents the path of a football being thrown, what does the y-intercept represent?

• The maximum height of the ball

• The release height of the ball

• Minimum height of the ball

• The ball hitting the ground

The function represents the path of a football being thrown, what does the x-intercept represent?

• The maximum height of the ball

• The release height of the ball

• Minimum height of the ball

• The ball hitting the ground