Equation

• says how a value for a variable is to be calculated

• often, represents the relationship between one quantity (Y), and one or more influencing quantities (X1, X2 etc)

• uses standard algebraic expressions

• may include a sketched graph function

• may include a tabulated function

• may include conditional elements

• in Simile, a single ‘equation window’ is used for all quantities (incl. parameters and initial compartment values)