# Is the process weakly stationary?

$$y_t=5+ε_t, ε_t |I_(t-1)~N(0,σ_t^2 ),σ_t^2=σ^2 y_t^2$$

Is this process weakley stationary?

How can I tell?

• Welcome to CV. Since you’re new here, you may want to take our tour, which has information for new users. Please add the [self-study] tag and read its wiki. Then tell us what you understand thus far, what you've tried & where you're stuck. We'll provide hints to help you get unstuck. Please make these changes as just posting your homework & hoping someone will do it for you is grounds for closing. – jbowman May 29 '18 at 12:45
• @jbowman Thanks for the introduction, I know that this is the constant model, I know that it would be stationary by itself, but I get confused with the sigmat^2, will this impact the stationarity of the equation? – user22485 May 29 '18 at 13:15
• @jbowman does that answer work from your experience? – user22485 May 29 '18 at 13:25