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Ivanshal [37]
3 years ago
8

Find the formula for an exponential function that passes through the two points given.

Mathematics
1 answer:
goldenfox [79]3 years ago
3 0

Answer:

y = 7(3^x)

Step-by-step explanation:

Given

(x_1,y_1) = (0,7)

(x_2,y_2) = (4,567)

Required

Determine the formula

An exponential function is of the form:

y = ab^x

For point (x_1,y_1) = (0,7)

7 = ab^0

7 = a*1

7 = a

a = 7

For point (x_2,y_2) = (4,567)

567 = ab^4

Substitute 7 for a

567 = 7*b^4

Divide both sides by 7

81 = b^4

Take 4th root of both sides

\sqrt[4]{81} =\sqrt[4]{b^4}

\sqrt[4]{81} =b

b = \sqrt[4]{81}

b = 3

Substitute 7 for a and 3 for b in y = ab^x

y = 7 * 3^x

y = 7(3^x)

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