what is world output
A relation doesn't have an "output value", in the sense that a function does. A set of values is either part of the relation, or it isn't.
The set of output values of a function or relation is the range
With a constant level of world resources, international trade brings about an increase in total world output. International trade causes each country to specialize in the production of goods in which it has a comparative advantage. In this case, the world uses its resources more efficiently resulting in additional output.
comparative advantage
The Range is the set of all possible output values of a function or relation.
A relation is a function if every input has a distinct output.
No, not every relation is a function. In order for a relation to be a function, each input value must map to exactly one output value. If any input value maps to multiple output values, the relation is not a function.
Productivity
A relation has pairs of numbers. A function is a special relation where for each input there is one and only one output.
Relation
A relation is a mapping or pairing of input values with output values.
What is the relation ship between total fixed cost and output?