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​ALGEBRA 1 STATE TEST PRACTICE

Modeling with a Quadratic Function

9/15/2018

 
The manager of a company uses the function shown to model its profit based on the price of a product in dollars, x.

f(x) = (x - 2)(53 - x)
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A.)  What is the minimum price, 
in dollars, to avoid a loss?
B.)  What is the maximum price, 
in dollars, to avoid a loss?
C.)  What is the price, in dollars, that 
results in the greatest profit?

If you use the graphing calculator, you will see:

The graph of this quadratic function would be a parabola, with:
- the x-axis representing the price of the product 
- the y-axis representing the total profit
Picture
A.)  $22 is the minimum price to avoid a loss    {an x-intercept where the profit is $0}
B.)  $53 is the maximum price to avoid a loss   {an x-intercept where the profit is $0}
C.)  $37.50 is the price that results in the greatest profit   {the maximum/vertex of the parabola}
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