The ordering and transportation cost C (in hundreds of dollars per car) for an automobile dealership is modeled by C = x 2 1 + x + 6 where x is the number of automobiles ordered. (a) Find the open intervals on which C is increasing or decreasing. (Enter your answers using interval notation. Round your answers to two decimal places.) increasing decreasing (b) Use a graphing utility to graph the cost function.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter4: Polynomial And Rational Functions
Section4.3: Zeros Of Polynomials
Problem 64E
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The ordering and transportation cost C (in hundreds of dollars per car) for an automobile dealership is modeled by
C = 6
+
x 2 1
X + 6
where x is the number of automobiles ordered.
(a) Find the open intervals on which C is increasing or decreasing. (Enter your answers using interval notation. Round your answers to two decimal places.)
increasing
decreasing
(b) Use a graphing utility to graph the cost function.
C
C
10-
10
8
8
6
4
4
2
Transcribed Image Text:The ordering and transportation cost C (in hundreds of dollars per car) for an automobile dealership is modeled by C = 6 + x 2 1 X + 6 where x is the number of automobiles ordered. (a) Find the open intervals on which C is increasing or decreasing. (Enter your answers using interval notation. Round your answers to two decimal places.) increasing decreasing (b) Use a graphing utility to graph the cost function. C C 10- 10 8 8 6 4 4 2
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