What is the significance of the mean of a probability distribution?

Significance of the mean of a probability distribution.          

Step-by-step explanation:

The mean of a probability distribution is the arithmetic average value of a random variable having that distribution.For a discrete probability distribution, the mean is given by, , where P(x) is the probabiliy mass function.For a continuous probability distribution, the mean s given by, , where f(x) is the probability density function.Mean is a measure of central location of a random variable. It is the weighted average of the values that X can take, with weights given by the probability density function. The mean is known as  expected value or expectation of X.An important consequence of this is that the mean of any symmetric random variable (continuous or discrete) is always on the axis of symmetry of the distribution.For a continuous random variable, the mean is always on the axis of symmetry of the probability density function.

The coordinates of point a right now is (-3,-1) you have to multiply these coordinates by a factor of 2 to get (-6,-2)