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| Question 1092506:  An ice cream vendor finds that her daily opening cost is $350 plus $0.60 per portion served. Each portion is sold for $2.
 A) write a linear function to describe the total cost of x- portions.
 B) write the function for revenue earned by the scale of x- portions
 C) how many portions must be produced and sold to break even?
 D) what revenue is earned when the vendor breaks even?
 Answer by greenestamps(13209)
      (Show Source): 
You can put this solution on YOUR website! Pretty straightforward stuff.  You should be able to do it yourself.
 
 A: Cost:  The fixed daily operating cost, plus $0.60 for each of the x portions sold.
 
 (Or, to make it better algebraic form, $0.60 for each of the x portions sold, plus the fixed daily operating cost.  That is, "y = mx+b" instead of "y = b + mx").
 
 B: Revenue:  $2 for each of the x portions sold.
 
 C: She breaks even when her revenue is equal to her cost.  Set the two equations from A and B equal to each other and solve to find the value of x (number of portions sold) that makes revenue = cost.
 
 D: Plug the value from C into the revenue function from B.
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