Let the rule f(t) represent the number of people, in millions, who own cell phones t years after 1990. Explain the meaning of the following statements: f(10) = 100.3.
Answer
Understanding the Function Statement f(10) = 100.3 in the Context of Cell Phone Ownership
Function Overview:
The function f(t) represents the number of people (in millions) who own cell phones, where t is the number of years since 1990. This means:
t = 0 → corresponds to the year 1990
t = 10 → corresponds to the year 2000
What Does f(10) = 100.3 Mean?
The equation f(10) = 100.3 tells us that in the year 2000 (i.e., 10 years after 1990), the number of people who owned cell phones was approximately:
100.3 million people
So, the function value at t = 10 gives a snapshot of cell phone ownership in that specific year.
Breakdown of the Statement
- f(t): Represents a real-world quantity – cell phone owners in millions.
- t = 10: Refers to the year 2000 (1990 + 10).
- f(10) = 100.3: Means 100.3 million people owned cell phones in that year.
Why This is Useful
This type of mathematical model helps analysts, businesses, and researchers:
- Track the growth of technology over time
- Forecast future user adoption trends
- Make data-driven decisions in telecommunications and marketing
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Published on Learnlyfly — Empowering learners to connect real-world data with mathematical functions.