MATH GLOSSARY
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Title  Description  

xIntercept  Where a graph crosses (intersects) the xaxis in rectangular or Cartesian coordinates is termed an XIntercept. 

xy Plane  The familiar coordinate plane. The xaxis is almost universally horizontal; the yaxis is subsequently vertical. Or, the Plane of XY in threedimensional space with ordered triples (x, y, z). 

xz Plane  In three dimensions, the plane orthogonal to the yaxis. 

Xi  The 14th letter of the Greek alphabet. 
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