Use the table to answer the question.

Write the exponential equation that contains the points shown in the table.

x y
−1

1
10
2 2160
(1 point)
The equation is $$y=·.

1 answer

To write the exponential equation containing the points from the table, we have two points:

  1. \((-1, 10)\)
  2. \((2, 2160)\)

An exponential function can be written in the form:

\[ y = ab^x \]

where \(a\) is the initial value when \(x=0\), and \(b\) is the growth factor.

Using the points given:

  1. For the point \((-1, 10)\):

\[ 10 = ab^{-1} \implies 10 = \frac{a}{b} \quad (1) \]

  1. For the point \((2, 2160)\):

\[ 2160 = ab^2 \quad (2) \]

Now we have two equations. We can solve for \(a\) and \(b\).

From equation (1):

\[ a = 10b \quad (3) \]

Substituting equation (3) into equation (2):

\[ 2160 = (10b)b^2 \] \[ 2160 = 10b^3 \] \[ b^3 = \frac{2160}{10} = 216 \] \[ b = \sqrt[3]{216} = 6 \]

Now substitute \(b = 6\) back into equation (3) to find \(a\):

\[ a = 10(6) = 60 \]

Putting this all together, the exponential equation is:

\[ y = 60 \cdot 6^x \]

Thus, the final exponential equation is:

\[ \boxed{y = 60 \cdot 6^x} \]

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