Math Glossary Letter QqednounQED stands for the Latin phrase quod erat demonstrandum, which means That which was to be proven. Used at the end of a proof
quadrantnoun1 of 4 sections on the Cartesian graph. Quadrant I: (x, y), Quadrant II (-x, y), Quadrant III, (-x, -y), Quadrant IV (x, -y)
Quadrant InounThe first quadrant on a cartesian graph, located in the upper-right hand side. All points are in the form (x, y).
Quadrant IInounThe second quadrant on a cartesian graph, located in the upper-left hand side. All points are in the form (-x, y).
Quadrant IIInounThe third quadrant on a cartesian graph, located in the lower-left hand side. All points are in the form (-x, -y).
Quadrant IVnounThe fourth quadrant on a cartesian graph, located in the lower-right hand side. All points are in the form (x, -y).
quadraticnounPolynomials with a maximum term degree as the second degree
quadratic equationnounEquation with a polynomial with a maximum term degree as the second degree
quadratic inequalitynounInequality with a polynomial with a maximum term degree as the second degree
quadrilateralnounPolygon with 4 edges/sides and 4 corners/vertices
quadruplenounMultiply by 4
qualitative datanounInformation that describes something. This is information you can observe
quantitative datanounInformation given in numbers or values that you can count or measure
quantitynounamount of something
quartnounUnit of liquid volume
quarternounA currency unit worth 25 cents
quartic equationsnoun4th degree polynomial equations
quartilenoun1 of 4 equal groups in the distribution of a number set
querynounA question, often associated with a data set from a database
quintilenounThe bottom 20% or the upper 80% of a number set
quintuplenounMultiply by 5
quotientnounThe result of dividing two expressions.
quotient-remainder theoremnounWhen we divide A by B, Q is the quotient, R is the remainder