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proportion

An equation that states that two ratios are equal.

independent variable

the tested varaible

dependent variable

the measure of change in the independent variable

double number line diagram

A graphic diagram that shows a proportional relationship between two quantities.

Coefficient

the decimal part

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.

numerical expression

A mathematical phrase that has a combination of numbers and at least one operation

inequality

A mathematical sentence that shows the relationship between quantities that are not equivalent

expression

A mathematical phrase without an equal sign.

Evaluate

To find the value of a mathematical expression.

Equation

A mathematical sentence that contains an equals sign

constant

A value that does not change

algebraic expression

An expression consisting of one or more numbers and variables along with one or more arithmetic operations

y-Coordinate

The vertical measure, which is the second number in an ordered pair.

y-axis

The vertical axis on a coordinate plane.

x-Coordinate

is the first number in an ordered pair and it represents the location relative to the x-axis.

x-axis

The horizontal axis on a coordinate plane.

quadrants

Four regions into which a coordinate plane is divided by the x-axis and the y-axis

plot

to place points on a graph or coordinate plane

origin

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

ordered pair

A pair of numbers that can be used to locate a point on a coordinate plane.

coordinate system

the grid formed by the intersection of two number lines, the horizontal axis and the vertical axis

coordinate plane

A plan formed by the intersection of a horizontal number line called the x-axis and a vertical number line called the y-axis.

coordinate pair

A pair of numbers telling where a point lies on a graph it is always (x,y)

axis

Set of boundaries on a graph. x-axis and y-axis.

upper extreme

the largest number of a set of data

tape diagram

a drawing that looks like a segment of tape, used to illustrate number relationships

table

Shows a relationship by listing the data for the two variables in pairs.

statistics

The science of collecting, organizing, analyzing, and interpreting data in order to make decisions

statistical variability

a variability or spread in a variable or a probability distribution; examples: variance, standard deviation, and interquartile range

spread

A numerical summary of how tightly the values are clustered around the center. Measures: IQR, Standard Dev.

Range

The difference between the greatest number and the least number in a set of data.

outlier

a data value that is either much greater or much less than the median

measure of variation

A number that indicates how dispersed scores are around the mean of the distribution.

measure of center

A value at the center or middle of a data set.

Mean

the sum of all the values divided by the number of values

line plot

A diagram showing frequency of data on a number line.

lower extreme

The smallest number in a data set (box & whisker).

interquartile range

the difference between the first and third quartiles

Histogram

A bar graph depicting a frequency distribution. The height of the bars indicates the frequency of a group of scores.

distribution

The _____________________________ of a var. gives: possible values of the variance; the relative frequency of each value.

dot plot

graph with each individual entry

cluster

A number of similar things grouped together

box plot

also called a box and whisker plot

vertex

The point where two sides meet. (Shared end points of the line segments of a polygon.)

volume

measures the amount of space taken up by the object.

Scalene Triangle

A triangle with no congruent sides

Right Triangle

A triangle with one right angle.

plane

A flat surface.

perpendicular

two lines that intersect and form a right angle are

obtuse triangle

A triangle with one obtuse angle.

net

a 2-dimentional pattern that can be folded to make a 3-dimentional solid

isosceles triangle

Triangle with 2 equal sides and 2 equal angles.

intersect

to meet or cross

equilateral triangle

Triangle with a 90° angle

attribute

a quality or characteristic belonging to or associated with someone or something

acute triangle

A triangle with three acute angles.

area

the surface; Length x Width

area model

A model for multiplication problems in which the length and width of a rectangle represent the factors and the area of the rectangle represents the product.

altitude

What is the apothem called In a triangle?

Magnitude

The number of degrees a regular polygon can be rotated to map onto itself.

absolute value

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

Integer

The set of whole numbers and their opposites.