BASIC ALGEBRA GLOSSARY
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Title  Description  

Variable  A Variable is a symbol, most often a letter, to represent a quantity that may change value, that is literally to vary in its value. 

Velocity  Formally a vector in physics, Velocity has both magnitude (speed) and direction. 

Venn Diagram  Most often graphics of overlapping circles and ovals, a Venn Diagram depicts sets, subsets, and their intersections and unions. 

Verify  To confirm is to Verify. When we Verify, we prove or establish some assertion to a dependable conclusion independent from bias. There is wisdom in these words: "Trust, but Verify." 

Vertex  A "corner" of a polygon is a Vertex; an extremum of a conic section is a Vertex; the endpoint(s) of rays that form an angle is a Vertex. 

Vertical  Straight up, perpendicular to horizontal, is Vertical. Vertical lines have an indeterminate or infinite slope. 

Vertical Angles  When two lines cross (intersect) they form two pairs of Vertical Angles; the Angles within each pair of Vertical Angles are congruent.  
Vertical Line Test  Given a relation between x and y expressed as y = f(x), the relation is a function if the graph passes the Vertical Line Test; no vertical line may cross the graph more than once. No single element from the domain of x may generate more than a single value of y mapped into the range, to be considered a function. 

Volume  The extent to which an object fills units of threedimensional space is its Volume. 
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