probability

likelihood of an event occurring 

find the median and ouliers 

18 19 79 17 20 12

outliers

small numbers that don't go with bigger numbers 

eg 1 98 99 20

median

 the middle number in a set of data after setting it from least to greatest

mode

the most frequently occurring  number in a set of data

Circle graphs

a graph that represents data using sections of a circle

Central Angle

an angle formed by 2 radii with the vertex 2 lines point at the center of a circle

Parallel lines

Lines in the same plane that never cross or intersect

Perpendicular

Lines in the same plane that intersects in a 90 degree angle.

Intersecting

Lines in the same that meet or cross

Click here to watch a video about Constants

Variable math video

definition for constant

a number that does not change and it increases or decreases the value of an expression

definition for variable

a letter that represents an unknown number

EG X, A, N

Definition for value

a known or calculated amount

Numerial Coefficant Video

Numerial Coefficant

A number that multiples the variable

Click this video about expressions

Expression

any single number or variableof operations (-,+,x) involving numbers and variables

Rule for 9

Sum of all the digits must equal 9
eg 18 1+8=9
225 2+2+5=9
623781 6+2+3+7+8+1=27
2+7=9