The pressure of a certain gas in atmospheres, p, and its corresponding volume in liters, v, are shown in the table. for the points in the table, does pressure vary directly with volume? if so, identify k and write an equation. no, this is not a direct variation. yes, this is a direct variation with k = . yes, this is a direct variation with k = 1. yes, this is a direct variation with k = 3.the pressure of a certain gas in atmospheres, p, and its corresponding volume in liters, v, are shown in the table. for the points in the table, does pressure vary directly with volume? if so, identify k and write an equation. no, this is not a direct variation. yes, this is a direct variation with k = . yes, this is a direct variation with k = 1. yes, this is a direct variation with k = 3.