Increase in D: Increase in income - normal good, Increased advertising, Population increases, Price of substitute rises, Price of complement falls, Decrease in D: Increase in income- inferior good, Population falls, Goes out of fashion, Price of substitute falls, Price of complement rises,

لوحة الصدارة

النمط البصري

الخيارات

تبديل القالب

استعادة الحفظ التلقائي: ؟