You can put this solution on YOUR website! How do I graph f(x)=0.3^x
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Same as any graph.
Pick values for x and find f(x)
eg,
x = 0, f(x) = 1
x = 1, f(x) = 0.3
x = 2, f(x) = 0.09
etc
Plot the points (as many as you like), draw a curve thru them.