John's father asked him to compare several different cell phone plans and identify which plan will be the least expensive for the family. Each phone company charges a monthly fee, but this fee does not cover any services: phone lines,
texting, or internet access. Use the information contained in the table below to answer the following questions.
Cell Phone Plans
Price per Phone Line
Monthly Fee
(Includes 1,500
shared minutes)
Price per line for
Unlimited Texting
Price per line for
Internet Access
Name of Plan
x
2
Company A
$70
$20
$15
$15
Company B
$90
$15
$10
$20
Company
$200
$10
included in monthly
fee
included in monthly
fee
All members of the family may not want identical plans therefore, we will let x represent the number of phone lines, y
represent the number of phone lines with unlimited texting, and a represent the number of phone lines with internet
access