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Sure. Hold down Alt while moving them.
Of course. Highlight the keys you wish to scale, then on the timeline there is a switch to turn on the graph editor (right most switch above the layers and looks like a wave on a graph). Here you can look at a value or speed graph (you most likely want value to scale, and speed to interpolate the keys) and translate the keys accordingly. Lasso the desired keys in graph mode and you are presented with tranform handles to manipulate with.