Question

In 2002, 946 million telephones with cords were sold. Each year after that, the number of the number of corded phones fell by approximately 28 million per year. The same year, approximately 16 million cell phones were being used, and this number was predicted to increase by approximately 34 million per year. Let x represent the number of years since 2002 and y represent the total number of accountsWrite an equation for each company to represent the number of accounts in a give year

Answer 1

The companies being considered are:

The company that is concerned with corded telephones

The company that is concerned with cellphones

Let x represent the number of years since 2002 and y represent the total number of accounts

From the information given,

Considering the first company,

Initial number of accounts = 946 x 10^6

The number of accounts fell by approximately 28 million per year. This means that in x years, the number of accounts that would have been lost is

28 x 10^6 * x

= - 28x x 10^6

It is negative because it is reducing

The slope intercept form of a linear equation is expressed as

y = mx + c

where

m = rate of change

c = y intercept of value of y when x = 0

By comparing with the given scenario,