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Describe the parent function and then use a table of values to graph the functions.
Graph:
Transformation: A horizontal translation 5 units right.
The given function is an absolute value function, so its parent function is f(x)=|x|. We will start by graphing both functions in one coordinate plan. Then we will compare them to describe the transformation.
To graph both of the functions, we will use a table of values. We will choose a variety of x-values: at least one negative, 0, and at least one positive.
x | f(x)=|x| | g(x)=|x-5| |
---|---|---|
-2 | |-2|= 2 | |-2-5|= 7 |
0 | |0|= 0 | |0-5|= 5 |
5 | |5|= 5 | |5-5|= 0 |
7 | |7|= 7 | |7-5|= 2 |
Now let's plot the functions using these points! Remember that the graph of absolute value functions is V-shaped.
Having drawn our functions, we can describe the transformation.
We see that each y-value is being shifted 5 units to the right. This is a horizontal translation.