Answer:
Domain of the given function is all real numbers i.e. R.
Explanation:
It is given that the given graph is a V shaped graph.
It is crossing x - axis at

then y-axis at
and
then again x - axis at
.
If we try to plot the graph, the graph will be like it comes down from the negative x axis side and then intersect x axis at
, then intersects y axis at
and then rises towards the right side (i.e. positive x axis) intersecting the positive x axis at
.
Please find attached graph for the same.
This graph denotes the following function:

Domain of a function
is the values of
that can be provided to the function.
Here function is a modulus function and from graph we can easily infer that it can have any Real Number, R as its input.
Modulus function has R as its domain.
So, the answer is:
Domain of given function is all Real Numbers, R