Glossary
A

Absolute value
An absolute value of a number x, written as x, is the distance from x to 0 on a real number line.
See Absolute Value Equation 
Accuracy
How close a measurement is to an actual value.

Algebra
The branch of mathematics involving the rules of operations and relations when working with variables.
B

Bar graph
A graph with rectangular bars (plotted either vertically or horizontally) with lengths proportional to the values they represent.
See Pie Charts & Bar Graphs 
BEDMAS
The most common acronym for order of operations, meaning Brackets first, then Exponents, Division, Multiplication, Addition, and Subtraction.
See Order of Operations 
Binomial
A polynomial with two terms or a sum of two monomials; e.g. 5x + 1.
See Expanding
C

Calculus
The branch of mathematics involving limits, derivatives and integrals.
See Calculus: Introducing the Concept 
Chain Rule
A formula for the derivative of the composite of two functions: [f(g(x))] ′ = f ′(g(x))∗g ′(x)
See Derivative Rules 
Circle
A geometrical shape that consists of the set of points in a plane that are equidistant from a given point (the centre).
See Introduction to Circles  Circumference

Commutative Property
A property for some operations (such as addition or multiplication) which states that changing the order of the operands does not change the end result: a+b = b+a.

Complex Numbers
A number that can be represented by an expression of the form a+bi where a and b are real numbers, and i is a symbol with the property i^{2} = −1i^{2} = −1.
See Complex Numbers  Composition of Functions

Coefficient
A constant (number) multiplied with a variable; e.g. 5 is a coefficient of x in the term 5x.

Constant