a is equal to 27.40422 is an intercept or autonomous consumption showing that if Disposable Income Yd is equal to 0, the amount of consumption would be Lm27, 404,220.
a ni sawa na 27.40422 ni kukatiza au uhuru matumizi kuonyesha kwamba kama Disposable Mapato Yd ni sawa na 0, kiasi cha matumizi itakuwa Lm27, 404,220.