SOLUTION: Describe a real world situation that can be modeled by the function y=2x-3.?

Question 378632: Describe a real world situation that can be modeled by the function y=2x-3.?

Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
Few real-life models use a straight line, but here is an example:
Suppose x people are eating at a (really cheap) buffet which costs $2 a person. Then the cost y is y = 2x. With a $3 off coupon it becomes y = 2x-3 (however I'm sure that most restaurants would want a sufficient number of people to make profit).
Many other real-life applications are modeled using other functions. The bell curve is among the most common form, as it is used in statistics and distributions. Population models use a logistics function, another type of transcendental function. The catenary curve occurs when a chain or power line hangs on two ends, and is modeled by the hyperbolic cosine function y = cosh(x).
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