Slices for two tables

I have two tables in my model. Both of them are not related but have one column that is called the same (Type). There a several differrent values in this column but both have one that is the same 'Business'. I would like to create a slicer for a yes/no that if yes is selected filters both tables to only show values where type=business. What I tried is create a new table (table 3, one column called type with only one value, 'Business'). Next I made the relationship between this new table and both other tables on the type field. Now I can create a slicer that works but the options are 'Business'  or '(blank)'. I would like to replace (blank) with no for the slicer. I only have no clue how to do this.