Please see the graph.
Work Step by Step
$y=2*(1/2)^x$ Two points on the line: Let $x=1$ $y=2*(1/2)^1$ $y=2*1/2 = 1$ $(1,1)$ Let $x=2$ $y=2*(1/2)^2$ $y=2*1/4 = 1/2$ $(2,.5)$
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