## Algebra and Trigonometry 10th Edition

$a_n=4(0.5)^{n-1}$ $a_1=4(0.5)^{1-1}=4(0.5)^{0}=4$ $a_2=4(0.5)^{1-2}=4(0.5)^{-1}=2$ $a_3=4(0.5)^{1-3}=4(0.5)^{-2}=1$ $a_4=4(0.5)^{1-4}=4(0.5)^{-3}=0.5$ ... $a_{10}=4(0.5)^{1-10}=4(0.5)^{-9}=0.0078125$ The graph labeled as d matches the sequence.