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4 votes
Look at the graph.

Which function can be used to represent the graphed geometric sequence?

answer choices:

a) f(x)=80(1/4)^x-1

b) f(x)=320(1/4)^x-1

c) f(x)=80(4)^x-1

d) f(x)=320(4)x-1

Look at the graph. Which function can be used to represent the graphed geometric sequence-example-1
User Senad
by
8.3k points

2 Answers

5 votes

Answer:

its A on endgenuity

Explanation:

User Kevin Burandt
by
8.0k points
0 votes

Answer:


f(x) =80 \cdot \: {( (1)/(4) )}^(x - 1)

Explanation:

Fro the graph, the first three terms of the sequence are 80,20,5,...

This is a geometric sequence with first term


f(1)= 80

The common ratio is


r = (20)/(80) = (5)/(20) = (1)/(4)

The function is given by


f(x) = f(1) \cdot \: {r}^(x - 1)

We substitute the values we got from the graph into this formula to get:


f(x) =80 \cdot \: {( (1)/(4) )}^(x - 1)

The correct answer is A

User JCarlosR
by
7.6k points

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