Question

Match the geometric sequence with its graph from the choices below

an=15(4/5)^(n-1)

Answer 1

those are the answer choices^

Answer 2

you should try a few values for n

try n=1
in an=15(4/5)^(n-1)

Answer 3

remember x^0 is 1 where x is any number

now try n=2

Answer 4

an=15(4/5)^(n-1)
a1=15(4/5)^0=15
a2=15(4/5)^(2-1)=15*4/5=12
a3=15(4/5)^(3-1)=15(4/5)^2=15*16/25
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it is (E)