35 terms

# Haun Pre-algebra Quiz 5 (Chapter 1)

Words for Quiz 5
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sum
difference
product
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