# Haun Pre-algebra Quiz 5 (Chapter 1)

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Words for Quiz 5

### quotient

when you see this word in a problem, estimate!

### variable

a letter that stands for a mystery number

### expression

when we add, subtract, multiply, or divide. This can have numbers, variables, or both

### algebraic expression

an expression that has at least one variable

### numerical expression

an expression that has no variables

### Substitution Property of Equality

if two amounts are equal, I can replace one with the other

### evaluate

find the answer to an expression

### property

a statement that is true for any numbers

### Commutative Property

only works for adding and multiplying. The order of my numbers will not change the answer. (Remember: moving)

### Associative Property

only works for adding and multiplying. How the numbers are grouped does not change the answer. (Remember: who you are with)

when I add 0 to anything, I keep the same number

### Multiplicative Identity

when I multiply 1 by anything, I keep the same number

### Multiplicative Property of Zero

0 times anything is 0

### equation

a math sentence that has an equals sign

### open sentence

might or might not be true depending on what number we put in

### Symmetric Property

if one number equals a second number, the second number equals that first number

If a=b, b=a

### Transitive Property

if the first number equals the second number and the second number equals the third number, then the third number equals the first number

If a=b and b=c, then a=c

### coordinate plane

where we plot points. It has an x-axis and a y-axis

### x-axis

the horizontal (↔) number line on a graph

### y-axis

the vertical (↕) number line on a graph

### origin

the point where the x-axis and the y-axis intersect: (0,0)

### ordered pair

the numbers that tell me where a point is located on the graph

### x-coordinate

the first number in an ordered pair. Shows how far over the point is

### y-coordinate

the second point in an ordered pair. Shows how far up the point is

### relation

a set of ordered pairs

### domain

the x-coordinates in a relation

### range

the y-coordinates in a relation

### scatter plot

a graph where we plot ordered pairs on a coordinate plane

### positive relationship

as one thing goes up, the other goes up

### negative relationship

as one thing goes up, the other goes down

### no relationship

one does not affect the other

Example: