Asher

3. a symbol, typically a letter, that refers to an unspecified mathematical object.
4. there are infinitely many values of the variables that can satisfy the equation
6. a system in which the change of the output is not proportional to the change of the input.
8. a function that maps the set of nonnegative real numbers onto itself.
9. a real number that cannot be expressed as a ratio of two integers
11. an equation that may be put in the form where are the variables, and are the coefficients, which are often real numbers
12. the study of graphs, which are mathematical structures used to model pairwise relations between objects
13. a written arrangement of symbols following the context-dependent, syntactic conventions of mathematical notation

1. represents a part of a whole or, more generally, any number of equal parts
2. An equation has no solution if solving it leads to a false statement
5. there is only one value for the variable that makes the equation true
7. numbers that can be expressed as a fraction where both the numerator and denominator are integers, and the denominator is not zero
10. a mathematical equation that expresses the relationship between two expressions on both sides of the 'equal to sign