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22 Cards in this Set
 Front
 Back
Relation

A set of ordered pairs


Domain

The set of xcoordinates in a relation


Range

The set of ycoordinates in a relation


Function

a relation in which each element of the domain is paired with EXACTLY ONE element in the range


Vertical Line Test

Using a straightedge to represent a vertical line, move the straightedge from left to right on the graph. For each value of x, the vertical line can only pass through ONE point on the graph.


Positive relationship in a scatter plot

points appear to suggest a line that slants upward from left to right


Negative relationship in a scatter plot

points appear to suggest a line that slants DOWNWARD from left to right


No relationship in a scatter plot

points seem to be random


linear equation

an equation with two variables whose graph is a straight line. It has an infinite number of solutions


funtional notation

equations represented as functions and are written in the form "f(x)"


slope of a line

(1) describes steepness
(2) vertical change ÷ horizontal change or change in "y" ÷ change in "x" or diff in ycoord ÷ diff in xcoord 

parallel lines

lines that will never intersect because they have the same slope


4 Types of slope

(1) positive
(2) negative (3) zero (4) no slope 

Zero slope

slope is horizontal line


undefined (no) slope

a vertical line


xintercept

where the graph crosses the xaxis (ycoordinate is zero)


yintercept

where graph crosses the yaxis (x coordinate is zero)


origin

where the xaxis and yaxis intersect


slopeintercept form of the line

y = mx + b
where m = slope and b = yintercept 

standard form of a line

Ax + By = C
A, B, and C are integers and A is positive 

system of equations

several linear equations graphed together in the same coordinate plane


solution to a system of equations

the ordered pair that is a solution of ALL linear equations in the system
