Identify a variable you might use to represent each quantity. And identify what units would be most appropriate.
  1. Let
    be the age of a student, measured in
    .
  2. Let
    be the amount of time passed since a driver left Portland, Oregon, bound for Boise, Idaho, measured in
    .
  3. Let
    be the area of a two-bedroom apartment, measured in
    .
  1. The unknown quantity is age, which we generally measure in years. So we could define this variable as:
    “Let be the age of a student, measured in years.”
  2. The amount of time passed is the unknown quantity. Since this is a drive from Portland to Boise, it would make sense to measure this in hours. So we could define this variable as:
    “Let be the amount of time passed since a driver left Portland, Oregon, bound for Boise, Idaho, measured in hours.”
  3. The unknown quantity is area. Apartment area is usually measured in square feet. So we’ll define this variable as:
    “Let be the area of a two-bedroom apartment, measured in ”