Functions and Graphs 2 Flashcards
What is ALWAYS used to write where a graph is increasing, decreasing, or remains constant.
Open intervals on the x-axis (because behavior at endpoints is excluded).
From what to what direction should evaluation of a graph happen when determining the increasing, decreasing, or constant states of a graph?
From left to right.
What’s a relative maximum in a graph?
A relative maximum is the greatest y value in a local(small) area of a graph. It is called relative, or local, because it doesn’t relate to the whole graph but for a small portion of it instead.
What is reffered to as a relative “peak” in graphs?
The relative maximum of that specific area.
What’s a relative minimum?
A point on a graph where the graph goes from decreasing to increasing. Aka the lowest point.
What’s used as an answer when asked for the location of a relative maximum/minimum?
The x value of that specific point.
What’s used as an answer when asked for the relative maximum of a specific point?
The y value of that point.
What does the word “symmetria” mean?
The same measure.
Find the relative maximum and its location for the function f(x) = x^3-3x.
Relative maximum location -1, the value of the relative maximum = 2.
What’s the definition for a symmetric graph with respect to the y-axis?
A graph is symmetric with respect to the y-axis if for every (x,y) point on the graph, the point (-x,y) is also on the graph.
What’s the definition for a symmetric graph with respect to the x-axis?
A graph is symmetric with respect to the x-axis if for every point (x,y) on the graph, the point (x,-y) is also on the graph.
What’s the definition for a symmetric graph with respect to the origin?
A graph is symmetric with respect to the origin if for every (x,y) point, the point (-x,-y) is also on the graph.
With respect to what is the graph of the function f(x) symmetric if f(-x) = f(x)?
To the y-axis.
Using the equation of a function, how do we test if a function is symmetric with respect to the y-axis? Use f(x) = x^2 for your explanation.
Replace x with -x in the equation, if the new equation is equivalent, then the function’s graph is symmetrical in respect to the y-axis.
y = x^2,
y = (-x)^2 = x^2,
(y=x^2) = (y=(-x^2)), the function’s graph is symmetrical to the y-axis.
What type of symmetric graph is not a function?
Graph symmetric with respect to the x-axis.