document.write( "Question 75791: Can you show me how to graph y=log2x? The 2 should be subscripted. Can you show me how to plug in points and graph? \n" ); document.write( "

Algebra.Com's Answer #54429 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
This is $\"y+=+log%282%2Cx%29\"$
\n" ); document.write( "This says y is a log. A log is an exponent to some base. The base is 2.
\n" ); document.write( "You can rewrite it as $\"2%5Ey+=+x\"$
\n" ); document.write( "Now pick some values of y and find x.
\n" ); document.write( "y = 0
\n" ); document.write( "x = 1
\n" ); document.write( "-----
\n" ); document.write( "y = 1
\n" ); document.write( "x = 2
\n" ); document.write( "-----
\n" ); document.write( "y = 3
\n" ); document.write( "x = 8
\n" ); document.write( "-----
\n" ); document.write( "y = 4
\n" ); document.write( "x = 16
\n" ); document.write( "-----
\n" ); document.write( "y = -1
\n" ); document.write( "x = 1/2
\n" ); document.write( "-----
\n" ); document.write( "y = -2
\n" ); document.write( "x = 1/4
\n" ); document.write( "------
\n" ); document.write( "you can plot these points. Note that x can never be negative \n" ); document.write( "

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