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wariber [46]
3 years ago
5

Which sequence is modeled by the graph below? points are (1,3) (2,0.6) (3, 0.12)

Mathematics
2 answers:
Leokris [45]3 years ago
8 0
ANSWER
a_n =3(  \frac{1}{5} ) ^{n - 1}
Step-by-step explanation

The ordered points given to us are
(1,3),(2,0.6),(3,0.12)
The y-coordinates are the terms in the sequence.

We use the y-coordinates to determine the common ratio.

r =  \frac{0.6}{3}  =  \frac{0.12}{0.6}  =  \frac{1}{5}

The first term of the sequence is the first y-coordinate.

a_1 = 3

The nth term of an exponential sequence is given by,



a_n =a_1  \times r  ^{n - 1}


We now substitute the above values in to the general formula to obtain,


a_n =3(  \frac{1}{5} ) ^{n - 1}
Lina20 [59]3 years ago
5 0
A) works for all three sets of ordered pairs. 
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