Intersection of Graphs
Videos and lessons to help High School students
explain why the x-coordinates of the points where
the graphs of the equations y =f(x)
and y = g(x) intersect
are the solutions of the equation f(x)
= g(x); find the solutions approximately,
e.g., using technology to graph the functions, make tables of
values, or find successive approximations. Include cases
where f(x) and/or g(x)
are linear, polynomial, rational, absolute value, exponential, and
Suggested Learning Targets
Explain why the intersection of y = f(x) and y = g(x) is the
solution of f(x) = g(x) for any combination of linear, polynomial,
rational, absolute value, exponential, and logarithmic functions.
Find the solution(s) by:
Using technology to graph the equations and determine
their point of intersection
Using tables of values
Using successive approximations that become closer and closer to
the actual value.
Common Core: HSA-REI.D.11
Finding Points of Intersection
f(x) = g(x)
Points of Intersection using the Table, Graph and Equation
Points of Intersection
Determining the Intersection of Two Graphs on the TI83/84
This video shows how to use the TI83/84 to determine the points of
intersection/s of two graphs.
TI Calculator Tutorial: Points of Intersection
This tutorial will teach you how to find Point of Intersection with
your TI calculator.
The following widget will plot 2 graphs and show the points of
Polynomial Properties: How Many Zeroes?
Polynomial Properties: How Many Points of Intersection?
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