### fundamental counting principal

if a 2 step situation or experiment has blank ways to do the first step and blank ways to do the second step then the total number of possible outcomes for both steps is m*n

### random sample

a sample in which every individual in the population has the same chance of being included

### representative sample

a sample for which the results of the sample can be considered the same as the results from the entire population

### bias

the differences between what the responses of a sample are and what the actual responses from the entire population would be

### outlier

a number or numbers that are at one or the other end of a set of data arranged in order where there is a gap between the end of numbers and the rest of the data

### variable

something that has different outcomes, a letter or a symbol that represents a number in an algebraic expression

### horizontal axis

the x-axis in a coordinate system, it is a number line that locates points to the left or to the right of the origin

### vertical axis

the y-axis in a coordinate system, it is a number line that locates points to up or down from the origin

### order of operations

the order in which operations in an expression to be evaluated are carried out. Do the operation in parentheses first, next evaluate exponents, then multiple and divide from left to right, and finally add and subtract from left to right