A domain is the set of first coordinates of the ordered pairs of a relation.
A function is a relationship in which each member of the domain is paired with exactly one member of the range. A number of the domain is an input and the related number of the range is an output.
Function notation that represents a function as f(x) instead of y.
A function rule is an equation that describes a function.
A linear equation is any equation whose graph is a line.
A linear inequality is a number sentence in which the equal sign of a linear equation is replaced with >,<.
A correlation is a relation between two sets of data. The date have a positive correlation if, as one set of values increases, the other set tends to increase. The data have little or no correlation if the value show no relationship.