Question

Which function can be used to represent the graphed geometric sequence

Answer 1

ANSWER IS A

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Answer 2

ANSWER


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


Step-by-step explanation

The term of the sequence are;


`80,20,5,...`


The first term of the sequence is,


`a_1=80`



The common ratio is


`r = (20)/(80)`


`r = (1)/(4)`

The sequence is given by the formula



`f(x)=a_1r^(x-1)`


When we substitute the values into the formula we get,


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


The correct answer is A