I have a number of patients this month who need to start a course of treatment.
The treatment involves an injection now, followed by 4 more injections at monthly intervals, and then 3 more injections 2 months apart. That's a total of 8 injections in 1 year.
Each month, I have a new batch of patients who start treatment.
So, as time goes on, each month, more injections need to be done. We will need to do more injections in January 2017 compared to the number of injections in January 2016. We will need to do way more injections in January 2018.
Could you please devise an equation that will tell me <how many injections are needed per month> on the Y-axis vs <time> on the X-axis?