document.write( "Question 293300: thanks for the help in advance trying to help a friend.\r
\n" ); document.write( "\n" ); document.write( "Yellow trucking company for a round trip is 30$ and .10$ a mile after 250 miles
\n" ); document.write( "Gray trucking company for a round trip is 20$ and .10$ a mile.\r
\n" ); document.write( "\n" ); document.write( "I know to graph this you use Y=mx+b\r
\n" ); document.write( "\n" ); document.write( "But i keep coming up with answers that are wrong because i am not sure were to start on graphing it or if i am doing something wrong.
\n" ); document.write( "

Algebra.Com's Answer #211743 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Yellow trucking company for a round trip is 30$ and .10$ a mile after 250 miles
\n" ); document.write( "Cost = $30 + $0.10(x-250) where x is the number of round trip miles.
\n" ); document.write( "Plot two points and draw a line thru them:
\n" ); document.write( "If x = 250, y = 30
\n" ); document.write( "If x = 350, y = 40
\n" ); document.write( "Plot the points (250,30) and (350,40)
\n" ); document.write( "\"graph%28400%2C300%2C-10%2C400%2C-10%2C100%2C30%2B0.10%28x-250%29%29\"
\n" ); document.write( "---------------------------------------
\n" ); document.write( "Gray trucking company for a round trip is 20$ and .10$ a mile.
\n" ); document.write( "Cost = $20 + $0.10x
\n" ); document.write( "If x = 100, y = 30
\n" ); document.write( "If x = 200, y = 40
\n" ); document.write( "Plot the points (100,30) and (200,40)
\n" ); document.write( "\"graph%28400%2C300%2C-10%2C400%2C-10%2C100%2C20%2B0.10x%29\"
\n" ); document.write( "------
\n" ); document.write( "Putting both on the same axis you get:
\n" ); document.write( "\"graph%28400%2C300%2C-10%2C400%2C-10%2C100%2C30%2B0.1%28x-250%29%2C20%2B0.1x%29\"
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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