Question

Let P(x)be the number of people in the U.S. who own

cell phone x years after 1995. Explain the meaning of:
P(5)= P(15)
P(20) = P(21)
P(13) = P(10)

Answer 1

The function P(x) represents the number of cell phone owners in the U.S. x years after 1995. Equals signs between two P(x) values mean that the number of cell phone owners was the same at those two different years.

Step-by-step explanation:

Let P(x) be the number of people in the U.S. who own a cell phone x years after 1995. When we interpret the statements like P(5) = P(15), P(20) = P(21), and P(13) = P(10), they tell us about the ownership of cell phones at different points in time.

• P(5) = P(15): The number of cell phone owners 5 years after 1995 (which is 2000) is the same as 15 years after 1995 (which is 2010).
• P(20) = P(21): The number of cell phone owners 20 years after 1995 (which is 2015) remained the same the following year.
• P(13) = P(10): The number of cell phone owners 13 years after 1995 (which is 2008) was the same as the number 10 years after 1995 (which is 2005).

This kind of analysis is useful for understanding trends and patterns in cell phone ownership over time.