Math Problem Statement

Model the data using an exponential function f(x) = Abx.

x

0

1

2

f(x)

600

1,800

5,400

Solution

To model the given data using an exponential function of the form f(x)=Abxf(x) = Ab^x, we need to determine the constants AA and bb. The provided data points are:

x=0,f(x)=600x = 0, f(x) = 600 x=1,f(x)=1800x = 1, f(x) = 1800 x=2,f(x)=5400x = 2, f(x) = 5400

Step 1: Find AA

When x=0x = 0, the exponential function simplifies to:

f(0)=Ab0=Af(0) = A \cdot b^0 = A

Given that f(0)=600f(0) = 600, we have:

A=600A = 600

Step 2: Find bb

Next, we can use the second data point x=1,f(1)=1800x = 1, f(1) = 1800 to solve for bb. Substituting into the equation f(x)=600bxf(x) = 600 \cdot b^x, we get:

1800=600b11800 = 600 \cdot b^1

Dividing both sides by 600:

b=1800600=3b = \frac{1800}{600} = 3

Step 3: Verify the function

Now that we have A=600A = 600 and b=3b = 3, the function is:

f(x)=6003xf(x) = 600 \cdot 3^x

We can verify this with the third data point x=2,f(2)=5400x = 2, f(2) = 5400:

f(2)=60032=6009=5400f(2) = 600 \cdot 3^2 = 600 \cdot 9 = 5400

This matches the given data.

Final Model:

The exponential function that models the data is:

f(x)=6003xf(x) = 600 \cdot 3^x

Would you like more details or have any questions?

Here are 5 related questions:

  1. How does the constant AA in an exponential function affect the graph?
  2. What role does the base bb play in determining the rate of growth?
  3. How would you modify this model if the growth was exponential decay?
  4. How can you determine an exponential function from a graph without given points?
  5. What are the real-world applications of exponential growth functions?

Tip: In exponential functions, the base bb determines the growth factor. If b>1b > 1, the function represents exponential growth. If 0<b<10 < b < 1, it represents exponential decay.

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Math Problem Analysis

Mathematical Concepts

Exponential Functions
Algebra

Formulas

Exponential Function f(x) = Ab^x

Theorems

Properties of Exponential Functions

Suitable Grade Level

Grades 9-11