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Which is a stretch of an exponential decay function? f(x) = Four-fifths (five-fourths) Superscript x f(x) = Four-fifths (four-fifths) Superscript x f(x) = Five-fourths (four-fifths) Superscript x f(x) = Five-fourths (five-fourths) Superscript x

2 Answers

5 votes

Answer:

2

Explanation:

B

User Kaushik Wavhal
by
7.5k points
6 votes

Answer:

Options 2 and 3 are correct.

Explanation:

The general form of an exponential decay function is
f(x) = a(b)^(x) where b < 1.

Now, the four exponential functions are:

(i)
f(x) = (4)/(5)((5)/(4) )^(x) is not an exponential decay function as
(5)/(4) > 1.

(ii)
f(x) = (4)/(5)((4)/(5) )^(x) is an exponential decay function as
(4)/(5) < 1.

(iii)
f(x) = (5)/(4)((4)/(5) )^(x) is an exponential decay function as
(4)/(5) < 1.

(iv)
f(x) = (5)/(4)((5)/(4) )^(x) is not an exponential decay function as
(5)/(4) > 1.

So, options 2 and 3 are correct. (Answer)

User Daniel Beck
by
7.3k points
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