document.write( "Question 424839: How do you write a function rule to describe the amount of sales tax as a function of the price of an item purchased if the sales taxis 6%? \n" ); document.write( "

Algebra.Com's Answer #296050 by JoeFourier(1) $\"\"$ $\"About$

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First you have to think about how to write 6% in a way that we can understand mathematically.\r
\n" ); document.write( "\n" ); document.write( "To do this think of what 6% means. 6% means 6 out of 100. So in fractions we have 6/100 and in decimals we have .06\r
\n" ); document.write( "\n" ); document.write( "For a function rule we will use the decimal representation, .06\r
\n" ); document.write( "\n" ); document.write( "Now, to solve for the amount of sales tax we have to multiply our tax rate, .06, by the price of the item.\r
\n" ); document.write( "\n" ); document.write( "Let x be the price of the item. Then we can call our function f(x).\r
\n" ); document.write( "\n" ); document.write( "Since we need to multiply the price by the tax rate we now have:\r
\n" ); document.write( "\n" ); document.write( "f(x) = (.06)x \n" ); document.write( "

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