<prompt> Translate the following text to SwahiliThe remarkably similar shapes of the two surfaces demonstrate a convergence of simulation and regression approaches to estimating the behavior of delivery costs with postal density and volume per address as cost drivers.  <response>: Maumbo ya kawaida ya nyuso mbili zinaonyesha kuungana kwa mbinu za simulation na regression kwa kukadiria tabia ya gharama za utoaji na wiani wa posta na kiasi kwa anwani kama madereva ya gharama. 