Lesson 1.1 Practice B Functions Worksheet With Answer Key Page 3
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12In Exercises 22-24, use the following information.
Minimize Cost A baker has modeled the monthly operating costs for making wedding cakes by the function y =
12x + 150 where y is the total cost in dollars and x is
2
0.5x
the number of cakes prepared.
22.
Find the vertex and axis of symmetry.
23.
What is the minimum cost?
24.
How many cakes should be prepared each month to yield the minimum cost?
In Exercises 25 and 26, use the following information.
Maximize Revenue A sports store sells about 50 mountain bikes per month at a price of $220 each. For each
$20 decrease in price, about 10 more bikes per month are sold.
25.
Write a quadratic function in standard form that models the revenue from bike sales.
26.
What price produces the maximum revenue?
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