Eduqas GCSE Mathematics key terms

The amount of time between two events, rather than the clock reading at either event.

A set of observations recorded in time order, usually at regular intervals.

A change that maps an original shape or point to an image, for example a rotation, reflection or translation.

A transformation that moves every point the same distance in the same direction, without turning or resizing the shape.

A straight line that crosses two or more other lines.

A quadrilateral with exactly one pair of parallel sides, using the convention in this lesson.

A method of estimating an area under a curve by dividing it into vertical strips, replacing their curved tops with straight lines and adding the resulting trapezium areas.

A branching representation of possible outcomes in successive stages, with probabilities labelled on the branches.

The overall direction of change in a time series, rather than each short-term rise or fall.

A single test with a recorded outcome, such as one roll of a die.

A numerical method that tests values in an equation and uses the results to choose better trials.

A number formed by adding consecutive positive integers starting at 1: $1,3,6,10,15,\ldots$.

A graph of a trigonometric function, such as $y=\sin x$, $y=\cos x$ or $y=\tan x$, showing how its value changes with the angle $x$.

A quotient of two side lengths in a right-angled triangle. Sine, cosine and tangent relate these quotients to an acute angle.

Removing digits beyond a specified place without rounding. For a positive number, the truncated value is the lower bound.

A point where a curve changes from decreasing to increasing, or from increasing to decreasing.

A table that classifies outcomes by two characteristics, with each interior cell showing a combination of those characteristics.

A sample collected without a method that systematically favours particular outcomes or members of the population.

An estimate less than the exact value.

The set of elements belonging to either set or both: $A\cup B$.

Every integer greater than 1 has exactly one prime factorisation, apart from the order of its prime factors.

A standard amount used to express a measurement, such as a metre for length or a kilogram for mass.

A method of solving proportion problems by finding the amount for one unit first, then scaling to the required number of units.

The price of a specified quantity of a product, such as pounds per kilogram or pence per 100 ml.

Data recording one variable, such as the height of each person in a group.

The complete set of items being considered in a particular problem.

The upper limiting value of a quantity. For a positive rounded or truncated value, the true value can approach this endpoint but cannot equal it.

The value about three-quarters of the way through ordered data, found as the median of the upper half for an ungrouped list.

A letter representing a quantity whose value can vary or be unknown.