document.write( "Question 1191116: Hi
\n" ); document.write( "A phone company charges 35c for the first minute of a call and 15c for each additional minute of the call. What is the cost y of a phone call lasting x minutes. \r
\n" ); document.write( "\n" ); document.write( "Thanks
\n" ); document.write( "
\n" ); document.write( "

Algebra.Com's Answer #822877 by Theo(13342)\"\" \"About 
You can put this solution on YOUR website!
the function would be y = .20 + .15 * x\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "the value of x is determined by the duration of the call.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "if the call lasts less than or equal to 1 minute, then x = 1 and the formula becomes y = .20 + .15 * 1 = .35\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "if the call lasts more than 1 minute and less than or equal to 2 minutes, then x = 2 and y = .20 + .15 * 2 = .50\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "if the call lasts more than 2 minutes and less than or equal to 3 minutes, then x = 3 and y = .20 + .15 * 3 = .65\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "if the call lasts more than 3 minutes and less than or equal to 4 minutes, then x = 4 and y = .20 + .15 * 4 = .80.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "if the call lasts more than 4 minutes but less than or equal to 5 minutes, than x = 5 and y = .35 + .15 * 4.= = .95\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "the function can be graphed.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "it looks like this.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );