Section 3.1 Linear Functions and Their Properties.

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Presentation transcript:

Section 3.1 Linear Functions and Their Properties

Since the average rate of change is not constant, the function is not linear.

Since the average rate of change is a constant –0.25, the function is linear.

I N C R E A S I N G D E C R E A S I N G C O N S T A N T

(d) The slope is the average rate of change and is –4000 so this means that for each additional year that passes, the book value of the car decreases by $4000. The car will have a book value of $8000 when it is 5 years old.

So the equilibrium price is $50 and the equilibrium quantity is 2100 phones.