<prompt> Bala sekhahla sa phetoho.Theko ea thepa e nyolohile ho tloha ho 20 ho ea ho 25 ka khoeli e le ngoe.  <response>: Instruction in English: Calculate the rate of change. . Response in English: The rate of change of the price of the commodity is calculated as the difference between the final value 25 and the initial value 20 divided by the time frame 1 month. So, the rate of change 25 - 20 1 5 per month.This means that the price of the commodity increased at a rate of 5 per month. . Response in Sesotho: Sekhahla sa phetoho ea theko ea thepa se baloa e le phapang pakeng tsa boleng ba ho qetela 25 le boleng ba pele 20 bo arotsoe ke nako ea nako khoeli e le ngoe. Kahoo, tekanyo ea phetoho 25 - 20 1 5 ka khoeli. Sena se bolela hore theko ea thepa e eketsehile ka tekanyo ea 5 ka khoeli. 