﻿ Reading Information from the Graph of a Function

# READING INFORMATION FROM THE GRAPH OF A FUNCTION

LESSON READ-THROUGH
by Dr. Carol JVF Burns (website creator)
Follow along with the highlighted text while you listen!
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• PRACTICE (online exercises and printable worksheets)

Suggested Review:

You must be able to read a wide variety of information from the graph of a function:

EXAMPLE:

The graph of a function $\,f\,$ is given below.

$f(0) = 10$

$f(1) = 0$

$f(2.03) = -10$

$\text{dom}(f) = [-2,3)$

$\text{ran}(f) = [-10,20)$

$f$ increases on $[-2,0)$

$f$ decreases on $[0,2]$

$f$ is constant on $[2,3)$

$\{x\ |\ f(x) = 10\} = \{-2,0\}$

$\{t\ |\ f(t) \gt 0\} = [-2,1)$

How can we tell this is the graph of a function?   It passes the vertical line test.
Master the ideas from this section
by practicing the exercise at the bottom of this page.

When you're done practicing, move on to:
basic function models you must know

On this exercise, you will not key in your answer.
However, you can check to see if your answer is correct.

Be careful! The number labels are a bit below and to the right of the tick marks!