# 8th Grade Unit 5, Lesson 1 Vocabulary

### 9 terms by mtschetter

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### Position Number

The number of the position that a number is in within a sequence.

### Algebraic Expression

A mathematical phrase which can contain numbers, operators (add, subtract, multiply, divide), and at least one variable (like x, y) to represent operations.

### Term

The numbers and variables in an algebraic expression that are separated by a "+" or "-" sign.

### Nth Term

A generalization that is used to describe any given number in a sequence; the position in the sequence of numbers.

### Constant Rate of Change

Change between consecutive totals (y=mx+b); also called the slope (m) and y-intercept (0,b).

### Consecutive

One after another; not skip counting (ex. 1, 2, 3, 4, ...).

### Evaluate

A term used in algebra that means to find the numeric value of a variable; to solve a problem.

### Arithmetic Sequence

What the sequence is called after new terms are added.

### Sequence

A pattern of numbers that may be described by an algebraic expression.

Example: