Variable
A symbol, usually a letter, which takes the place of an unknown value.
Venn Diagram
A visual representation of a set. Venn diagrams are used to organize and represent relationships between sets. A rectangle represent the whole set and circles represent the subsets.
Vertex
The turning point of a parabola
Vertical Line
A line that has a slope that is undefined.
Vertical Line Test
A test that determines if the graph of something is a function. If the graph crosses any vertical line at more than one point, the relation is not a function.
