From the description of the function as we can see in the question, the function is a quadratic function.
<h3>What is a quadratic function?</h3>
The term quadratic function refers to a type of function that is obtained from the equation ax^2+ bx + c =0.
A function in which as the domain values approach infinity, the range values approach infinity and as the domain values approach negative infinity, the range values approach infinity is a quadratic function.
Learn more about quadratic function:brainly.com/question/5975436?
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The answer is -10 hope this helpes
(9x-2) - (5x+6) =
4x-8 , this is your profit function
Is there more to this problem? By saying f(4), you'd be inputting a 4 for every variable x. There is not enough info here to answer the question.
