## Unit 1:

**Describes sets of data.**

__Mode, Median, and Range__-**(2,4,3,7,5,2,1)**

Number that occurs most often in a set of data

__Mode__-**Middle number in a set of data**

__Median__-**The span of numbers that a set of data includes. (subtract the highest and lowest #)**

__Range__-

(1,2,2,3,4,5,7) mode=2, median=3, range=6

__Example__:(1,2,2,3,4,5,7) mode=2, median=3, range=6

__Line Plots-__

Represents and organizes all data on a number line. The graph needs to have a title. The first number in the set is labeled first (it does not have to be one). Then you include every single digit inbetween the first and last number along the bottom whether or not they are included in the data set.

__Example__:

These are repeating patterns using numbers or pictures.

H.O.Q. - What would be the 11th and 13th number be in this number pattern?

1, 4, 7, 10, ...

These are problems that have a variable that we need to solve the problem. They have an equal sign.

H.O.Q. - What does the variable 'n' stand for in the equation 4 x n = 144 ?

n= 36

These represent a problem, but do not have an equal sign and are not meant to be

solved.

H.O.Q. - Mr. Tack has $500. He spent $45. Write an expression to represent the information. 500-45

We use this to compare numbers or expressions. Using the symbols <, >, or =

4+2 = 2x3 4+1 > 1x2 3-2 < 4x1

__Number Patterns/Picture Patterns__-These are repeating patterns using numbers or pictures.

__Example__: What is the missing number in the pattern: 3, 6, _, 9, 12, 15H.O.Q. - What would be the 11th and 13th number be in this number pattern?

1, 4, 7, 10, ...

__Example__: abb,abb,abb,abb,... would represent a picture pattern of heart, star, star, heart, star, star__Equations__-These are problems that have a variable that we need to solve the problem. They have an equal sign.

__Example__: 4 + n = 12 n= 8H.O.Q. - What does the variable 'n' stand for in the equation 4 x n = 144 ?

n= 36

__Expressions__-These represent a problem, but do not have an equal sign and are not meant to be

solved.

__Example__: 500-n or 500 + 54H.O.Q. - Mr. Tack has $500. He spent $45. Write an expression to represent the information. 500-45

__Inequalities__-We use this to compare numbers or expressions. Using the symbols <, >, or =

__Example__:4+2 = 2x3 4+1 > 1x2 3-2 < 4x1

__Coordinate Grids/Planes__-

These are the grids that we use to plot ordered pairs. They have an 'x' axis that is horizontal, and a 'y' axis that is vertical. 'x' comes first and then 'y'. (It is just like playing the game "Battleship")

__Example__:

(x,y)...(3,4)...we would move to the right three spots and up four. "over, up"

__Function Tables__-

These are input/output tables in which we apply a rule. The rule is stated in an expression.

__Example__:

5 10

3 6

10 20

I know that the rule is

__In Out__5 10

3 6

10 20

I know that the rule is

__n x 2__because I can apply it to all input numbers to get the output