SOLUTION: thanks for the help in advance trying to help a friend. Yellow trucking company for a round trip is 30$ and .10$ a mile after 250 miles Gray trucking company for a round trip i

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: thanks for the help in advance trying to help a friend. Yellow trucking company for a round trip is 30$ and .10$ a mile after 250 miles Gray trucking company for a round trip i      Log On


   

Question 293300: thanks for the help in advance trying to help a friend.
Yellow trucking company for a round trip is 30$ and .10$ a mile after 250 miles
Gray trucking company for a round trip is 20$ and .10$ a mile.
I know to graph this you use Y=mx+b
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.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Yellow trucking company for a round trip is 30$ and .10$ a mile after 250 miles
Cost = $30 + $0.10(x-250) where x is the number of round trip miles.
Plot two points and draw a line thru them:
If x = 250, y = 30
If x = 350, y = 40
Plot the points (250,30) and (350,40)
graph%28400%2C300%2C-10%2C400%2C-10%2C100%2C30%2B0.10%28x-250%29%29
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Gray trucking company for a round trip is 20$ and .10$ a mile.
Cost = $20 + $0.10x
If x = 100, y = 30
If x = 200, y = 40
Plot the points (100,30) and (200,40)
graph%28400%2C300%2C-10%2C400%2C-10%2C100%2C20%2B0.10x%29
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Putting both on the same axis you get:
graph%28400%2C300%2C-10%2C400%2C-10%2C100%2C30%2B0.1%28x-250%29%2C20%2B0.1x%29
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Cheers,
Stan H.
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