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a mathematical expression or equation using one or more of the symbols <, >, ≤, or ≥.
a graph consisting of bars, the heights (or lengths) of which correspond to the numerical values...
three values used to divide a set of data into four groups of equal size; the second quartile is...
(between two points on a curve) the inclination of a straight line through two points on a curve...
the limit of the average gradient as the change in x tends towards zero.