Question

Record the daily expenditure, quantities bought and prices paid per unit of the daily purchases of your family for two weeks. How has the price change affected your family?

Answer 1

Week I
	Potato				Onion
Days	Price (per kg) PWI	Quantity QWI	Expenditure PWI QWI	Price (per kg) PWI	Quantity QWI	Expenditure PWI QWI	Total Expenditure (Rs)
Monday	10	1	10	20	1	20	30
Tuesday	9	1	9	19	1	19	28
Wednesday	11	1	11	21	1	21	32
Thursday	12	15	18	20	1	20	38
Friday	8	1	8	19	2	38	46
Saturday	10	2	20	18	15	27	47
Sunday	9	1	9	20	1	20	29

 

Week II
	Potato			Onion			Total Expenditure (Rs)
Days	Price (per kg) PWII	Quantity QWII	Expenditure PWII QWII	Price (per kg) PWII	Quantity QWII	Expenditure PWII QWII
Monday	9	1	9	20	1	20	29
Tuesday	10	1.5	15	22	1.5	33	48
Wednesday	12	1	12	21	1	21	33
Thursday	10	1	10	19	1	19	29
Friday	11	2	22	18	1	18	40
Saturday	12	1	12	20	1	20	32
Sunday	10	1	10	22	1.5	33	43

The household on Monday of week one (WI) spend Rs 30, by buying 1 kg of Potato and 1kg of Onion at Rs 10 and Rs 20 per kg respectively, whereas, the price of Potato on Monday of the week second (WII) has reduced from Rs 10 to Rs 9 resulting in the reduction in the expenditure incurred by the household. Therefore, we can conclude that the decrease in price leads to a decrease in expenditure given the quantity purchased. We can also analyze that the price and quantity purchased by the household shares a negative relationship with each other.