Math Problem Statement

Write an exponential function in the form y, equals, a, b, to the power xy=ab x that goes through the points left parenthesis, 0, comma, 17, right parenthesis(0,17) and left parenthesis, 3, comma, 8704, right parenthesis(3,8704).

Solution

We are tasked with finding an exponential function of the form:

y=abxy = ab^x

that passes through the points (0,17)(0, 17) and (3,8704)(3, 8704).

Step 1: Use the point (0,17)(0, 17)

When x=0x = 0, we substitute into the exponential equation:

17=ab017 = ab^0

Since b0=1b^0 = 1, we get:

17=a17 = a

Thus, the equation becomes:

y=17bxy = 17b^x

Step 2: Use the point (3,8704)(3, 8704)

Now, substitute x=3x = 3 and y=8704y = 8704 into the updated equation:

8704=17b38704 = 17b^3

Step 3: Solve for bb

To find bb, divide both sides by 17:

b3=870417=512b^3 = \frac{8704}{17} = 512

Now, solve for bb by taking the cube root of 512:

b=5123=8b = \sqrt[3]{512} = 8

Step 4: Write the final equation

Now that we know a=17a = 17 and b=8b = 8, the exponential function is:

y=178xy = 17 \cdot 8^x

This is the exponential function that passes through the points (0,17)(0, 17) and (3,8704)(3, 8704).


Would you like any further details or have any questions?

Here are 5 related questions to expand on this concept:

  1. How do you graph an exponential function like y=178xy = 17 \cdot 8^x?
  2. What is the general effect of increasing or decreasing bb in the equation y=abxy = ab^x?
  3. How would the equation change if the point (3,8704)(3, 8704) were different?
  4. Can exponential functions model real-world situations? What are some examples?
  5. How does an exponential function compare to a linear function in terms of growth?

Tip: When solving for parameters like bb, always remember that exponentiation is reversible through roots or logarithms.

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Math Problem Analysis

Mathematical Concepts

Exponential Functions
Algebra

Formulas

Exponential function y = ab^x

Theorems

Laws of Exponents

Suitable Grade Level

Grades 9-12