Unit 1
A number written as "k", that is often found in a relationship like this:
y=kx
Constant of Proportionality
This means the "size" of the number, it always becomes positive, and is written like below:
|-5| =5
Absolute Value
This word describes a collection of numbers and variables WITHOUT an equal sign. For example:
2x+3y+9
Expression
This describes a collection of variables and numbers WITH an equal sign. For example:
2x+6 = 14
Equation
An amount of money added on to an item paid to the government
Tax
The length from one side of a circle to the other
Diameter
The total of all the data points divided by how many points there were (the "center" of a data set)
Mean / Average
An "equation" with two fractions, possibly with an unknown. For example:
5/12 = x/36
Proportion
This 3 letter strategy can be used to remember how to divide fractions.
K(eep) C(hange) F(lip)
This is a number in front of a variable:
16a
Coefficient
What you should do with your variable when you are given its value. For example:
Evaluate
12x+5 when x = 2
Substitute
An amount of money taken away from the total
Discount
Two angles that add to 180°
Supplementary Angles
The distance from the lowest data point to the highest data point
Range
"Something" per "something"
Rate
A number that can be written as a ratio of two other numbers. For example:
3/2 , 4 1/3 , 5.75
Rational Number
This is a number by itself within an expression. For example, 9 in the expression below:
3a+4b+9
Constant
This is a type of equation where instead of an equal sign, we have <, >, ≤, or ≥
Inequality
A certain percentage of the final sale price of an item that the salesperson makes
Commission
Two angles that are across from each other when two lines intersect
Vertical Angles
In a probability context, what you WANT to happen
Outcome
"Something" per ONE "something"
Unit Rate
This property lets you choose which addition or multiplication to do first. For example:
5 + (3 + 1) = (5 + 3) + 1
Associative Property
This phrase describes grouping together the same variables and numbers in an expression:
3x+5x = 8x
Combine Like Terms
This phrase describes the process of solving an equation by doing PEMDAS backwards.
Inverse Operations
A certain amount of money added to an account every month based on a percentage of the original amount
Simple Interest
The distance around a circle
Circumference
The chances of something occurring, calculated by divided the number of FAVORABLE outcomes, by the number of TOTAL outcomes
Theoretical Probability
A comparison of two numbers, written like so:
3:1, or 3/1
Ratio
This property lets you move terms around when multiplying or adding. For example:
2 * 3 = 3*2
Commutative Property
PEMDAS
This property lets you turn this:
2(x+1) = 4
into:
2x+2 =4
Distributive Property
A percentage that describes how far off from the actual number you are
Percent Error
The number that describes the relationship between the diameter and circumference of a circle
π
Experimental Probability