This is going to be the same as our standard deviation for our random variable y. And so we can say the standard deviation of y, of our random variable y, is equal to the standard deviation of our random variable x. So if you just add to a random variable, it would change the mean, but not the standard deviation. You see it visually here. Now, what if you were to scale a random variable? So what if I have another random variable? I don't know, let's call it z.