document.write( "Question 559826: Sam did 4 loads of laundry and it cost her $9. She did 6 loads of laundry and it coat her $13.50. Assume a linear relationship exists between the cost and the number of loads of laundry. How much will Sam pay for 5 loads of laundry?
\n" ); document.write( "Thank You for the help. \n" ); document.write( "

Algebra.Com's Answer #363532 by josmiceli(19441) $\"\"$ $\"About$

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Plot Cost on the vertical axis
\n" ); document.write( "Plot Loads on the horizontal axis
\n" ); document.write( "Use the point-slope formula to get the equation
\n" ); document.write( " $\"+%28+C+-+9+%29+%2F+%28+L+-+4+%29+=+%28+13.5+-+9+%29+%2F+%28+6+-+4+%29+\"$
\n" ); document.write( " $\"+%28+C+-+9+%29+%2F+%28+L+-+4+%29+=+4.5+%2F+2+\"$
\n" ); document.write( "Multiply both sides by $\"+2%2A%28+L+-+4+%29+\"$
\n" ); document.write( " $\"+2%2A%28+C+-+9+%29+=+4.5%2A%28+L+-+4+%29+\"$
\n" ); document.write( " $\"+2C+-+18+=+4.5L+-+18+\"$
\n" ); document.write( " $\"+2C+=+4.5L+\"$
\n" ); document.write( " $\"+C+=+2.25L+\"$
\n" ); document.write( "For 5 loads of laundry,
\n" ); document.write( " $\"+C+=+2.25%2A5+\"$
\n" ); document.write( " $\"+C+=+11.25+\"$
\n" ); document.write( "He pays $11.25 for 5 loads \n" ); document.write( "

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