Answer: The vertical stretch of 5 in the equation y = x is defined by
.
Step-by-step explanation:
The given equation is,

It can be written as,

The function is defined as
.
If
, then the function has a vertical stretch by a factor of S units.
If
, then the function has a vertical shrink by a factor of S units.
Since we have to find the vertical stretch of 5 in the equation y = x.


The below figure shows the graph of y = x and
.