Is it possible to scale F-Curves linearly? In the graph edutor, I press S then Y then 2. It doesn't multiply the x location of the key frames by 2. Instead, it multiplies every single key frame by a factor and I don't know what is this factor or what the equation is.
I added the generator modifier to an F-Curve. The original value of the X location = 1 (at a specific key frame). According to the equation in the modifier (Y = 1 X + 0). The, X location should not be changed (remains 1). But now it’s 201 and I don’t know why. I just would like to scale my F-Curve by a linear factor. How can I do this? I tried Factorized and Expanded polynomial but they are the same. Their equations give very high output numbers.
What scaling does depends on your pivot point for that graph editor viewport.  Try this: set your pivot point to 2D cursor.  Open a sidebar in the graph editor.  On the &quot;view&quot; tab, set the cursor location to 0,0.  Then select all and scale by 2.0 in the Y axis.  This will scale all the points about 0,0, which means multiplying all values by 2.  Is that what you want?
(Not at all clear what you expect to happen with your generator.  Again, the x in question here is frame count.  The X is an input, and if it's 201, it's because you're currently looking at frame 201.)