Final answer:
Yes, MIS support systems rely on mathematical models for computational and analytical routines.
Step-by-step explanation:
Yes, it is true that MIS (Management Information Systems) support systems rely on models for computational and analytical routines that mathematically express relationships among variables.
For example, in the field of business, MIS support systems use mathematical models to analyze and predict various aspects of the organization, such as sales forecasting, inventory management, and financial planning. These models help managers make informed decisions based on data-driven insights.
Therefore, the statement 'MIS support systems rely on models for computational and analytical routines that mathematically express relationships among variables' is true.