document.write( "Question 1172222: Write an exponential function in the form y=ab^x that goes through points (0, 20) and (8, 5120).
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Algebra.Com's Answer #797165 by Boreal(15235) $\"\"$ $\"About$

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y=ab^x
\n" ); document.write( "20=ab^0=a
\n" ); document.write( "so y=20ab^x
\n" ); document.write( "5120=20b^x
\n" ); document.write( "256=b^x
\n" ); document.write( "can recognize that 256 is 2^8
\n" ); document.write( "so the equation is y=20*2^x
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