# Find the Range

• Jan 15th 2009, 02:04 PM
magentarita
Find the Range
Find the range of f(x) = –x + 4 for the domain
{–3, –2, –1, 1}.

• Jan 15th 2009, 02:08 PM
masters
Quote:

Originally Posted by magentarita
Find the range of f(x) = –x + 4 for the domain
{–3, –2, –1, 1}.

Hi magentarita,

Simply substitute each value you have for the domain and find f(x) which is your range.

$f(x)=-x+4$

$f(-3)=-(-3)+4$

$f(-3)=3+4$

$f(-3)=7$

Like that....
• Jan 15th 2009, 02:08 PM
Moo
Quote:

Originally Posted by magentarita
Find the range of f(x) = –x + 4 for the domain
{–3, –2, –1, 1}.

The range is all the values the function can have.
In other words, the range will be {f(-3),f(-2),f(-1),f(1)}
• Jan 18th 2009, 07:01 PM
magentarita
ok...
Quote:

Originally Posted by masters
Hi magentarita,

Simply substitute each value you have for the domain and find f(x) which is your range.

$f(x)=-x+4$

$f(-3)=-(-3)+4$

$f(-3)=3+4$

$f(-3)=7$

Like that....

That's easy enough. Thanks!
• Jan 18th 2009, 07:02 PM
magentarita
ok..
Quote:

Originally Posted by Moo
The range is all the values the function can have.
In other words, the range will be {f(-3),f(-2),f(-1),f(1)}