LJF edit of Enlargement 3 Fractional and Negative SF (NJT)

What stays the [b]same[/b] and what [b]changes[/b] as you move [br][list][br][*]the slider (SF)[br][*]the centre[br][*]the vertices A,B,C?[br][/list][br]Are there any points that do not move under this transformation?
What stays the [b]same [/b]and what [b]changes [/b]as you move the [color=#ff0000][b]slider [/b][/color](SF)?
What stays the [b]same [/b]and what [b]changes [/b]as you move the [color=#0000ff][b]centre [/b][/color]of the enlargement?
What stays the [b]same [/b]and what [b]changes [/b]as you move the [b][color=#38761d]verties A, B, C[/color][/b]?
Are there any points that don't move under this transformation?[br][br][i](Note: points that don't move under a transformation are called invariant points.)[/i]
[color=#0a971e]Created by N.Trubridge[/color]
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Information: LJF edit of Enlargement 3 Fractional and Negative SF (NJT)