Ease Expression

I've put together an expression to randomly scale a layer according to the value of a slider. My problem is that I can't seem to get the scaling to ease- instead it acts like hold keyframes. Any suggestions?

holdTime = .2;
seed = Math.floor(time/holdTime);
seedRandom(seed,true);
multiplier = random(1,8);
Scaler = thisComp.layer("Scale Shaker").effect("Slider Control")("Slider");
Shaker = transform.scale[0]+multiplier+Scaler;

if (Scaler > 0){
[Shaker,Shaker];
}else {[value[0],value[1]];}