The variable interest rate on a student loan changes eachJuly 1 based on the bank prime loan rate. For the years1992–2007, this rate can be approximated by the modelr1x2 = - 0.115x2 + 1.183x + 5.623where x is the number of years since 1992 and r is theinterest rate as a percent.(a) Use a graphing utility to estimate the highest rate duringthis time period. During which year was the interest ratethe highest?(b) Use the model to estimate the rate in 2010. Does thisvalue seem reasonable?

The variable interest rate on a student loan changes eachJuly 1 based on the bank prime loan rate. For the years1992–2007, this rate can be approximated by the modelr1x2 = - 0.115x2 + 1.183x + 5.623where x is the number of years since 1992 and r is theinterest rate as a percent.(a) Use a graphing utility to estimate the highest rate duringthis time period. During which year was the interest ratethe highest?(b) Use the model to estimate the rate in 2010. Does thisvalue seem reasonable?

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter3: Functions And Graphs

Section3.5: Graphs Of Functions

Problem 58E

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