The imposition of integer restriction is necessary for models ...

[TVarnum]

The imposition of integer restriction is necessary for models where:
 a. nonnegativity constraints are needed.
  b. variables can take negative values.
  c. the decision variables cannot take fractional values.
  d. possible values of variables are restricted to particular intervals.

Question 2

Income is an example of
 a. categorical data
  b. either categorical or quantitative data
  c. dollar data
  d. quantitative data

[zenzy]

Answer to Question 1

C

Answer to Question 2

D

[TVarnum]

Excellent

[amandanbreshears]

Thanks for the timely response, appreciate it