Functions and Linear Relationships Vocabulary

A ratio shows how one variable changes with respect to another (e.g., $6.75/hr, 23 mi/gal).

The y-value of an ordered pair, represents the vertical placement of the point.

The horizontal (left/right) axis on the coordinate plane.

A set of ordered pairs, e.g., { (-5, 1), (-6, 2), (4, 0) }.

The x-value of an ordered pair, represents the horizontal placement of the point.

Formed by the intersection of two number lines: the horizontal axis and the vertical axis.

A relation in which each element of the domain is paired with exactly one element of the range. Example: { (-5, 1), (-6, 2), (4, 0) } where x's do NOT repeat.

The set of y-values within the ordered pairs of a relation.

The set of x-values within the ordered pairs of a relation.

The y-value within a function, e.g., Y=mx+b.