<prompt> Translate the following text to SwahiliAs shown in Equation 4, the D term in the Vb equation contains Pb, so when Pb changes, the discount is affected.  <response>: Kama ilivyoonyeshwa katika equation, D-term katika equation Vb ina Pb, hivyo wakati Pb mabadiliko, punguzo ni kuathiriwa. 