The transformation of the graph is known as a horizontal shift.
What informs the horizontal shift of a graph?
The transformation of the graph of
to
involves a horizontal shift to the left by 1 unit. When you replace
with
in the function, it causes the entire graph to shift one unit to the left along the x-axis.
In general, if you have a function
, where
is a constant, it represents a horizontal shift of
to the left by
units if
is positive and to the right if
is negative.
So, for
, the graph of
is shifted to the left by 1 unit.