Exponential Functions 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

A sample of a substance with an initial mass of 963 grams is decaying at a rate of 27% per hour.<\/p>

Create a function that can be used to find y<\/em>, the mass of the substance in grams remaining after x<\/em> hours.<\/p>

Enter your answer in the space provided.<\/p>

Mathematical Equivalence

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Tags

A1.5.9.C

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

A shipping company started with 40 employees. The number of employees in the shipping company increases at a rate of 7.5% each year. What function can be used to model the number of employees, f(x), in the shipping company after x years?

A sample of a substance with an initial mass of 500 grams is decaying at a rate of 32% per hour. 

 

Create a function that can be used to find y, the mass of the substance in grams remaining after x hours.

 

Enter your answer in the space provided.

Mathematical Equivalence

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There were 417 cell phones sold at an electronics store in January. Since then, cell phone sales at this store have increased at a rate of 3.75% per month. At this rate of growth, which function can be used to determine the monthly cell phone sales x months after January?