Graph the function `f(x) = x` after it has been vertically stretched by a factor of `2`, and vertically shifted `3` units.
Clear All Draw:
Using the identity function `(f(x) = x)`, graph the original point `(1,1)` with a vertical stretch of factor `2` by keeping the `x`-value the same and stretching the `y`-value by a factor of `3` units. Graph another original point `(-1,-1)` again by keeping the `x`-value the same and stretching the `y` value by a factor of `2` units. This is a graph with the vertical stretch. Now, shift these points up or down `3` units.
