Interpreting a Function Using Function Notation

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

Explain the meaning of f(4) = 16.

• The height is 16 feet at 4 seconds.

• The height is 4 feet at 16 seconds.

Choose the correct corresponding statement in function notation that represents the minimum height.

• h(20)

• h(40)

• h(0)

• h(70)

What does f(1990)=214 mean in the context of the problem?

• In 1990 there were 214 million people with health insurance

• In 214, there were 1990 people with health insurance

• When there are 1990 people, the year is 214

• None of these

What is x if
f(x) = -2?

• 4

• 0

• 3

• 8

Write the following in function notation. ABC Furnace charges $75 to make a house call and then $50 an hour after that.

• f(x) = 75x + 50

• f(x) = 50x - 75

• f(x)= 50x + 75

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 represent f(0)?

• Initial Value

• People that are sick after 10 days

• People that are sick after being healthy

• Number of days since the epidemic began