chapter 1 algebra 1
whole numbers
Natural numbers ( counting numbers) and zero; 0, 1, 2, 3...
absolute value
The distance a number is from zero on a number line
x-coordinate
the first number in an ordered pair
Integers
-3,-2,-1,0,1,2,3
natural numbers
1,2,3
algebraic expression
A mathematical phrase involving at least one variable and sometimes numbers and operation symbols.
equation
A mathematical sentence that contains an equals sign.
coordinate plane
A plane that is divided into four regions by a horizontal line called the x-axis and a vertical line called the y-axis.
function
A relationship that assigns exactly one output value to one input value.
inequality
A statement that compares two quantities using <, >, ≤,≥, or ≠
Variable
A symbol used to represent a quantity that can change
outlier
A value that "lies outside" (is much smaller or larger than) most of the other values in a set of data.
real numbers
All rational and irrational numbers
range
Distance between highest and lowest scores in a set of data.
median
Middle number
coordinates
Ordered pairs that identify points on a coordinate plane. (x,y)
order of operations
PEMDAS
absolute value of a real number
The absolute value of x is the distance from zero to x on a number line, denoted |x|
midpoint
The halfway point of a line segment
base
The number that is going to be raised to a power.
Domain
The possible values for the input of a relation or function
Range of a function
The set of all possible output values of a function
Mode
The value that occurs most frequently in a given data set.
simplify
To replace an expression with its simplest name or form.
evaluate
To substitute a given number for each variable, and then simplify.
stem and leaf plot
a display of data made by using the digits of the values
trend line
a line on a scatter plot that helps show the correlation between data sets more clearly
ordered pair
a pair of numbers used to locate a point
positive correlation
a relationship between variables in which one variable increases as the other variable also increases
independent variable
a variable (often denoted by x ) whose variation does not depend on that of another.
dependent variable
a variable (often denoted by y ) whose value depends on that of another.
function rule
an equation that describes a function
open sentence
an equation with one or more variables
Counterexample
an example used to support a claim or statement that is the opposite of another claim or statement
rational numbers
any number that you can write in the form a/b
negative correlation
as one variable increases, the other decreases
mean
average
power
has 2 parts, a base and an exponent
Exponets
little number-how mant times to multiply the base number/power
measures of central tendency
mean, median, mode
irrational numbers
numbers that cannot be expressed in the form a/b, where a and b are integers and b =0.
quadrant
one of four sections into which the coordinate plane is divided
x-axis
the horizontal number line in a coordinate plane
y-coordinate
the second number in an ordered pair
y-axis
the vertical axis on a coordinate plane
no correlation
there does not appear to be a relationship between two sets of data
scatter plot
two groups of data
opposites
two numbers with the same absolute value but different signs
origin
where the axes intersect
