OCR GCSE Mathematics key terms

A reflection followed by a translation parallel to the mirror line, which cannot in general be replaced by a single reflection, rotation or translation.

A measure of the rate at which $y$ changes as $x$ increases; for two points it is $m=\dfrac{y_2-y_1}{x_2-x_1}$.

A picture of the points whose coordinates satisfy an equation.

A representation of data that creates a false or distorted impression, for example through its scale, labels or visual design.

A change that moves or flips a graph while preserving the relationships between its points.

The finishing point of a drawn vector, marked by the arrowhead.

Half of a sphere, with one curved surface and one flat circular face.

The greatest numerical and algebraic factor shared by every term in an expression.

A diagram for grouped continuous data in which each bar's area represents its frequency.

The side opposite the right angle in a right-angled triangle.

An equality that is true for every permitted value of its variable or variables, often written using $\equiv$.

A statement meaning that each of two conditions implies the other, so both directions must be true.

The shape produced by a transformation.

An event that cannot happen; its probability is 0.

A fraction whose numerator is greater than its denominator, so its value is greater than $1$.

An angle formed by the two sides being used in a formula.

A point represented by a filled circle because its value is part of the solution set.

A comparison that includes equality, using $\le$ or $\ge$.

Events for which knowing whether one occurred does not change the probability of the other.

The power showing how many times a base is used as a factor; in $a^n$, $n$ is the index.

Notation such as $a^n$ in which a base is written with an index.

The plural of index.

A statement comparing two expressions using a symbol such as $<$, $>$, $\leq$ or $\geq$.

A conclusion about a population drawn from information collected from a sample.

The amount present when the number of elapsed time periods is zero.

The velocity at the start of the time interval being considered.

The value put into a function.