function

4. In mathematics a function from a set X to a set Y assigns to each element of X exactly one element of Y. The set X is called the domain of the function and the set Y is called the codomain of the function.
6. relationships between two variables where their ratios are equivalent.
9. In mathematics, the vertical line test is a visual way to determine if a curve is a graph of a function or not. A function can only have one output, y, for each unique input, x.
11. a pair of elements a, b having the property that ( a, b) = (u, v ) if and only if a = u, b = v.

1. In mathematics a function from a set X to a set Y assigns to each element of X exactly one element of Y. The set X is called the domain of the function and the set Y is called the codomain of the function.
2. In mathematics, a finitary relation over sets X₁, ..., Xₙ is a subset of the Cartesian product X₁ × ⋯ × Xₙ; that is, it is a set of n-tuples consisting of elements xᵢ in Xᵢ. Typically, the relation describes a possible connection between the elements of an n-tuple
3. the equation of a straight line in the form y = mx + b where m is the slope of the line and b is its y-intercept.
5. what is put in, taken in, or operated on by any process or system.
7. data that has two variables, a dependent and an independent variable
8. what comes out of the function
10. A set is the mathematical model for a collection of different things; a set contains elements or members, which can be mathematical objects of any kind: numbers, symbols, points in space, lines, other geometrical shapes, variables, or even other sets.