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Graph g(x)=|x−4|+3 not sure how to do this

User Binus
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1 Answer

6 votes

This is an example of transformation of a parent function. If you know the graph of the parent function, you just need to know how the transformation affect its shape, and you can graph any function derived from the parent one.

In this case, the parent function is
f(x)=|x|, i.e. the classic V-shaped function, with its spike on the origin. Now, about the transformation:


|x| \to |x-4|

is a transformation of this kind:
f(x)\to f(x+k). These transformations result in horizontal translations,
k units to the left if
k>0, to the right if
k<0. So, in your case, the graph if shifted to the right by 4 units.


|x-4| \to |x-4|+3

is a transformation of this kind:
f(x)\to f(x)+k. These transformations result in vertical translations,
k units down if
k>0, up if
k<0. So, in your case, the graph if shifted upwards by 3 units.

So, in the end, if you start from the graph of
f(x)=|x|, you can plot the graph of
|x-4|+3 by shifting the parent function 4 units to the right and 3 units up.

User KolA
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