1. Intro to Functions

2. Vocabulary Formed by the intersection of
two number lines – the horizontal x-axis
and the vertical y- axis
(x,y) example (-2,6) the y value (second)
gives the up down movement
The horizontal axis on the coordinate
plane
Consists of points that are not connected “dots”
The vertical axis on the coordinate
plane
Consists of points that are connected
The 4 regions into which the x and y
axis separate the coordinate plane
Set of ordered pairs
x values
The point (0,0) at which the x and y axis
intersect.
y – values
(x , y) which gives location on the coordinate
plane.
An illustration of how each element of the
domain is paired with an element from the
range
(x,y) example (-2,6) the x value (first)
gives left-right (horizontal) movement

3. A relation in which each element of the domain is paired with exactly one element of the range
“no repeated x values” or passes the vertical line test if it is graphed.
f(x) it is a way to name a function “f” that is defined by an equation
A value substituted for the “x” value
The answer – “y” value after evaluating for an “x” input
Any VERTICAL line passes through the graph of a function NO MORE THAN 1 time than it
Is a function and is considered to have “passed” the vertical line test.
The x intercepts also called roots it is the place where the graph touches the x axis.
intercepts
The place where the graph touches the y axis