Math Problem Statement

Find the equation of the exponential function represented by the table below: | x | y | |---|---| | 0 | 1 | | 1 | 4 | | 2 | 16 | | 3 | 64 |

Solution

To find the equation of the exponential function represented by the table, let's analyze the pattern of values in the table.

For an exponential function, the general form is: y=abxy = a \cdot b^x where:

  • aa is the initial value (when x=0x = 0),
  • bb is the growth (or decay) factor.

Step 1: Identify aa

From the table, when x=0x = 0, y=1y = 1. This means: a=1a = 1 So, the function so far is: y=1bx=bxy = 1 \cdot b^x = b^x

Step 2: Identify bb

To find bb, we can use another point in the table. For example, when x=1x = 1, y=4y = 4. Substitute these values into the function to solve for bb: 4=b14 = b^1 Thus, b=4b = 4.

Step 3: Write the Equation

With a=1a = 1 and b=4b = 4, the exponential function is: y=4xy = 4^x

So, the answer is: y=4xy = 4^x

Would you like additional details on how this process works, or do you have any questions?


Here are some related questions to further explore this topic:

  1. How would the equation change if the growth factor bb was a fraction?
  2. What happens to the function if the initial value aa is not 1?
  3. How can we identify exponential decay from a table?
  4. Can this method be used for any set of exponential function values?
  5. How can you verify that a given table represents an exponential function?

Tip: In an exponential function table, check the ratio between consecutive yy-values to confirm that it is consistent; this suggests an exponential relationship.

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Math Problem Analysis

Mathematical Concepts

Algebra
Exponential Functions

Formulas

y = a * b^x

Theorems

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Suitable Grade Level

Grades 8-10