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denis23 [38]
1 year ago
5

You want to calculate the value of your car each year when it depreciates by 15%. What does the term y mean in the exponential f

unction y=9500*0.85^x?

Mathematics
2 answers:
insens350 [35]1 year ago
4 0

Answer:

Value of the car after x years

Step-by-step explanation:

Exponential functions are generally expressed in the form: y=a(b)^x and since this function is decreasing, meaning it has an exponential decay, it can be expressed as: y=a(1-r)^x where r=rate of decay.

In this case the a represents the initial value or y-intercept, since when x=0, (1-r)^0 = 1, so we just have y=a(1) or y=a

The r represents the rate of decay

the x usually represents the time in seconds, days, months, or whatever unit is being used

The y value represents the value of whatever your measuring, and in this context it represents the value of the car after x years.

This is because a represents the initial value

After one year it's only 85% worth it's initial value or 15% less which is represented as 0.85(a)

After two years it's only 85% worth the previous year or 15% less the previous year, which is represented as 0.85(0.85(a))

This will continue to decrease the number of years increase

Alex73 [517]1 year ago
4 0

Answer:

the value of your car after x years

Step-by-step explanation:

The given function represents a geometric sequence with initial term $9500 and common factor 0.85.  Note that every time x increases by 1, we get the newest term by multiplying the previous one by 0.85.  The given function y=9500*0.85^x represents the value of your car after x years (which matches the 3rd answer choice).

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