Definitions In Algebra Flashcards
The set of all starting points is called?
The domain.
What is a relation?
A relationship between sets of information.
The set of all ending points is called?
The range
What is a function?
A well behaved relation.
What do we mean when we say a function is a well behaved relation?
We mean that given a starting point we know exactly where to go given an (x) we get only and exactly one (y).
What is a relation?
Any set of ordered pairs w
What do brackets indicate?
That there is a set of things.
What are sets called?
Sets are called unordered list.
What makes all functions relations
They pair information.
All functions are relations.
Are all relations functions?
No! Function are a sub-classification of relations.
For a relation to be a function what has to be?
There must be only and exactly one (y) that corresponds to a given (x).1
In linear inequalities what does greater than sign indicate?
Everything off to the right.
When solving inequalities, if you multiply or divide through by a negative what must I do?
Must flip the inequality sign.
Flip the inequality when?
When I have a negative number.
When I have a positive?
I do not have to flip inequality sign.
