Interpreting Function Notation of Exponential Functions

The number of people with the flu during an epidemic is a function, f, of the number of days, d, since the epidemic began. The equation f(d) = 50·(3/2)d defines f. How many people had the flu at the beginning of the epidemic? Explain how you know.

• 2

• 3

• 50

• 3/2

The number of people with the flu during an epidemic is a function, f, of the number of days, d, since the epidemic began. The equation f(d) = 50·(3/2)d defines f,

What does f(4.5) mean in this situation?

• Number of people that have the flu

• Time past after the 50

• The initial Value

• Amount of days since the epedemic

The number of people with the flu during an epidemic is a function, f, of the number of days, d, since the epidemic began. The equation f(d) = 50·(3/2)d defines f

How quickly is the flu spreading?

• (2/3) per day

• (3/2) per day

• 50·(3/2) per day

• 50 per day

The number of people with the flu during an epidemic is a function, f, of the number of days, d, since the epidemic began. The equation f(d) = 50·(3/2)d defines f.

What does f(3.5) represents in this situation?

• Days people are sick with the flu

• Amount of people that are sick with the flu

• Days since the epidemic began

• Initial Value

• 
• 
• 
• 

When is f(t) = 1500? What does this mean in this situation?

• A lot of money

• That after 0 year the dollar amount is 150

• That after 1 year the dollar amount is 1500

• That after 1500 year the dollar amount is 10

What is the equation of the graph shown, and what is the y-intercept?

• y = 1⁄3 (3)^x ; (0, 1⁄3)

• y = 1⁄3 (3)^x ; (0, 3)

• y = 3 (1/3)^x ; (0, 1⁄3)

• y = 3 (1/3)^x ; (0,3)

Given y=3^x determine the y-intercept

• 1

• 3

• 0

• y

What equation matches the graph?

• f(x) = 3^x

• f(x) = (⅓)^x

• f(x) = log₃(x)

What is the equation of the graph shown, and what is the y-intercept?

• y = 1⁄3 (3)^x ; a = 1⁄3

• y = 1⁄3 (3)^x ; a = 3

• y = 3 (1/3)^x ; a = 1⁄3

• y = 3 (1/3)^x ; a = 3