SOLUTION: What is the domain and range if there is a closed circle at (-4,4) and a open circle at (3,-5) thanks Write the domain and range of f using interval notation.

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Question 390524: What is the domain and range if there is a closed circle at (-4,4) and a open circle at (3,-5) thanks
Write the domain and range of f using interval notation.

Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
Suppose you have this graph:


Now look at its projection upon the x-axis, in green below:


Its projection in green upon the x-axis is its domain. So the domain
is the interval notation, taking the x-axis as a number line:
(-infinity,-4] U (3,infinity)
The range is its projection upon the y-axis. If you extended the
graph far enough the graph will project everywhere on the y-axis, so
the range is (-infinity,infinity). However your graph
may be different.
Edwin