Marijuana Use The function that models the percentof high school seniors using marijuana once or morein the prior 12 months is y = 0.0123x3 - 0.497x2 +5.95x + 14.9 , where x equals the number of yearsafter 1990. Is this a linear function? Why or why not?(Source: Monitoringthefuture.com)

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter8: Linear Functions
Section8.6: Writing Linear Equations
Problem 32E
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Marijuana Use The function that models the percent
of high school seniors using marijuana once or more
in the prior 12 months is y = 0.0123x3 - 0.497x2 +5.95x + 14.9

, where x equals the number of years
after 1990. Is this a linear function? Why or why not?
(Source: Monitoringthefuture.com)

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