document.write( "Question 1126927: Sofia PAYS $20 PER MNTH FOR a gym membership after paying an initial fee. After 15 months, she has paid a total of $450. Write an equation in point slope form representing the amount she has paid,y, after a given number of months,x. \n" ); document.write( "
Algebra.Com's Answer #743511 by somealgebratutor(1)\"\" \"About 
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Point slope form requires a point and a slope:\r
\n" ); document.write( "\n" ); document.write( "\"y+-+y1+=+m%28x+-+x1%29\"\r
\n" ); document.write( "\n" ); document.write( "where (x1, y1) is a point on the graph and m is the slope.\r
\n" ); document.write( "\n" ); document.write( "We know that x would be months and y would be amount paid.\r
\n" ); document.write( "\n" ); document.write( "In this scenario, we have the amount paid per month (the slope), and a point (15 months, $450).\r
\n" ); document.write( "\n" ); document.write( "Plug them into the equation to get:\r
\n" ); document.write( "\n" ); document.write( "\"y+-+450+=+20%28x+-+15%29\"
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