# CMS 8th Grade Math Vocabulary

## 33 terms · This is Carson City School District's key vocabulary for eighth grade pre-algebra.

### Positive Correlation

When the slope of a line is going up and to the right, you have POSITIVE Correlation.

### Negative Correlation

You have Negative Correlation when the slope of a line is up and to the left.

### Slope-intercept Form

y=mx+b ; where m is the slope and b is the y-intercept of the line.

### Coefficient

The number in front of a letter.

### Square Root

A number that when multiplied by itself results in the original number

### Box-n-whisker Plots

A way to display data in quartiles.

### Binomial

a polynomial expression with exactly two terms

### Diagonal

(geometry) a straight line connecting any two vertices of a polygon that are not adjacent

### m<A= 60

The measure of angle A equals sixty degrees.

### Interquartile range

The range of values between the first and the third quartile.

### Quartile

divide a data set into four equal parts

### Outlier

Any data point that sticks out. NOT all data sets have one.

### Inverse property

used when you solve equations - the operation which cancels out an operation - the opposite operation: addition and subtraction are opposites; multiplication and division are opposites

### Irrational Number

A never ending, non repeating decimal and can not be written as a fraction. (ex. 3.1415...)

### Exponent

The number that indicates how many times the base is used as a factor. (3 to the 4th power would be 3x3x3x3)

### Integer

A positive or negative whole number and zero (-3,-2,-1,0,1,2,3)

### Rate

A ratio that compares two quantities measured in different units

### Probability

a number that describes how likely it is that an event will occur.

### Combinations

number of ways to combine items in which order does NOT matter

### Odds

The ratio of the number of ways the event can occur to the number of ways the event cannot occur.

### Proportion

an equation that states that two ratios are equal

### Order of Operations

the order in which operations in an expression to be evaluated are carried out. 1. parentheses 2. exponets 3. multiplication and divison 4. addition and subtraction.

### Perfect Square

the product when a whole number is multiplied by itself (3 squared, 3x3)

### Tolerance

the measure above and below the set measure.

### Substitution

Putting a number in for a variable to help you solve an equation.

### Distance Formula

AB=√(x2 - x1)2 + ( y2 - y1)2

### Midpoint Formula

(x₁+x₂/2, y₁+y₂/2)

a^2+b^2=c^2

### Domain

the set of all input values

### Range

the set of output values

### Precision

exact or accurate

### Interior Angles

angles on the inside of parallel lines cut by a transversal.