Your answer was so helpful, I was hoping you could help me add one more element.
As the object scales up I want it’s parent object’s ( a null) Y position to animate in time as well. The expression you already gave me would do this, but I would like the value of the Y position to be controlled by a slider as well.
How do I get the Null’s second keyframe to be driven by a slider and still work with the other expression.
you are the man, of course.