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The number of users of the internet in a town increased by a factor of 1.01 every year from 2000 to 2010. The function below shows the number of internet users f(x) after x years from the year 2000.

f(x) = 3000(1.01)^x

Which of the following is a reasonable domain for the function?

0 ≤ x ≤ 10

2000 ≤ x ≤ 2010

0 ≤ x ≤ 3000

All positive integers

User Ineu
by
7.7k points

2 Answers

5 votes

Answer:

0 ≤ x ≤ 10

Explanation:

User Data Monk
by
7.6k points
7 votes

Answer

0 ≤ x ≤ 10

Explanation

The domain is the possible values that the variable
x can take.

The statement "the number of internet users f(x) after x years from the year 2000" is telling us that the x-axis represent the number of years, so the domain of the function is the number of years from 2000 to 2010.

Number of years = 2010 - 2000 = 10 years

So we know that
x is at most 10 years; therefore
x\leq 10

Since years can't be negative, we can also infer that x must be 0 or bigger than 0, so
0\leq x

Now we can combine both inequalities to find the reasonable domain of the function:


0\leq x\leq 10

User Blake Rivell
by
9.3k points

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