document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=664755>Question 664755</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a plumber charges $51 for 2 hours of work and $74.25 for 3/1/2 hours work. write an equation relating cost to number of hours worked </SPAN>\n" );
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document.write( "a plumber charges $51 for 2 hours of work and $74.25 for 3/1/2 hours work. write an equation relating cost to number of hours worked\r<BR>\n" );
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document.write( "Let the time (in hours) be x, and the dollar amount, y\r<BR>\n" );
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document.write( "We then have 2 points: (2, 51) and (3.5, 74.25)\r<BR>\n" );
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document.write( "Using these 2 points, along with the slope formula, we get m, or slope = 15.5\r<BR>\n" );
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document.write( "Using the slope, and the point (2, 51) in the point-slope formula: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+-+y%5B1%5D+=+m%28x+-+x%5B1%5D%29 ALIGN=MIDDLE  ALT=\"y+-+y%5B1%5D+=+m%28x+-+x%5B1%5D%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, we get:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+-+51+=+15.5%28x+-+2%29 ALIGN=MIDDLE  ALT=\"y+-+51+=+15.5%28x+-+2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > ----- <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+-+51+=+15.5x+-+31 ALIGN=MIDDLE  ALT=\"y+-+51+=+15.5x+-+31\"   DISABLED_style= \"max-width:90%; height:auto;\" > ----- <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+15.5x+%2B+20 ALIGN=MIDDLE  ALT=\"y+=+15.5x+%2B+20\"   DISABLED_style= \"max-width:90%; height:auto;\" > ------ <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28C%28x%29+=+15.5x+%2B+20%29 ALIGN=MIDDLE  ALT=\"highlight_green%28C%28x%29+=+15.5x+%2B+20%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Send comments and “thank-yous” to “D” at MathMadEzy@aol.com </SPAN>\n" );
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