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Variable

an alphabetic character representing a number, called the value, which is either arbitrary or not fully specified or unknown. It is usually a letter like x or y.

origin

The centre point of a number line (ground floor of a hotel, freezing point on a thermometer)

negative numbers

-amounts owed

Positive numbers

represents points to the right of the zero. p63

graph

A visual display of data

plotting

drawing the number that corresponds to a number in the graph. p63

order of operations

The rules for calculating a maths question containing mixed operations, such as 14 - 2 x 4 + 12

data

A collection of information gathered for a purpose. Data may be in the form of either words or numbers.

function

If you repeat an INPUT, and you always get the same OUTPUT, your data is a ______________________ .

real numbers

Any Number

Integers

the set of positive whole numbers and their opposites(negative numbers) and 0

absolute value

The distance of a number from zero on a number line; shown by | |

opposites

two numbers that have the same absolute value but have different signs

counterexample

An example that proves a conjecture false

velocity

The rate at which distance is changing with time.

matrix

a rectangular array of elements (or entries) set out by rows and columns

entry / element

each number in the matrix. p86

distributive property

Multiplying a sum by a number is the same as multiplying each term by the number and then adding (or subtracting ) the products.

Commutative Property

3 + 2 = 2 + 3

Associative Property

(1 + 2) + 3 = 1 + (2 + 3)

Identity Property

the sum of any number and zero is the original number

Property of Zero

a × 0 = 0

Property of opposites

a number multiplied by -1 is the opposite of the number

Coefficient

the decimal part

Like Terms

expressions that contain the same variables to the same power

simplified

if an expression has no grouping symbols and if all the like terms have been combined. p102

reciprocal / inverse property of multiplication

for every number other than zero, there exists its interchangeable compliment. p108

probability of an event

a measure of the likelihood that the event will occur. p114

outcomes

the different possible results when you do a probability experiment. p114

Event

a single outcome or a group of outcomes

theorectical probability

an "even roll" consiting of outcomes. p114

favorable outcomes

the outcomes for an event you wich to have happen. p114

experimental probability

What the outcomes did turn out to be in an experiment.

odds

favorable outcomes divided by unfavorable outcomes

Rational Number

Any number that can be expressed as a ratio of two integers. Example; 6 can be expressed as 6/1, and 0.5 as 1/2.