a. Is the value of a positive, negative, or zero?  Explain. b. Write an expression in terms of a and b that represents the year t when the company had the least revenue. c. The company made the same yearly revenues in 2008 and 2018.  Estimate the year in which the company had the least revenue. d. Assume that the model is still valid today.  Are the yearly revenues currently increasing, decreasing, or constant?  Explain.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.4: Values Of The Trigonometric Functions
Problem 24E
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The graph shows a quadratic function of the form R(t) = at2+bt+c, which represents the yearly revenue for a company, where R(t) is the revenue in year t.

 

a. Is the value of a positive, negative, or zero?  Explain.

b. Write an expression in terms of a and b that represents the year t when the company had the least revenue.

c. The company made the same yearly revenues in 2008 and 2018.  Estimate the year in which the company had the least revenue.

d. Assume that the model is still valid today.  Are the yearly revenues currently increasing, decreasing, or constant?  Explain.

R
R() = at2 + bt +c
Year, t
Yearly revenue, R
Transcribed Image Text:R R() = at2 + bt +c Year, t Yearly revenue, R
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