I want to make a graph showing parallel slopes for the following data. The variable REGION consists of Northeast regions coded as 1 and south regions coded as 3. The variable totalvisits is the total amount of visits. I want to create a graph showing the slopes of the totalvisits of every REGION by year.

Code:
* Example generated by -dataex-. To install: ssc install dataex
clear
input double REGION float totalvisits double VYEAR
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end
label values REGION REGIONF
label def REGIONF 1 "Northeast", modify