Question

The table below shows the weekly change in the price of one gram of gold for four weeks. ONE GRAM OF GOLD Week Weekly Change in the Price (dollars) 1 +1.25 2 3.125 3 +0.625 4 +1.5 By how much did the price of one gram of gold change from the beginning of week 1 to the end of week 4? Did the price increase or decrease? Explain how you found your answer. At the end of week 4, the price per gram of gold was $39.28. What was the price per gram of gold at the beginning of week 1

Answer 1

Part 1:

From the table, in week 1, the price increased by $1.25, in week 2, the price decreased by $3.125, in week 3, the price increased by $0.625 and in week 4, the price increased by $1.5

After the 4 week the change in price is given by 1.25 - 3.125 + 0.625 + 1.5 = 0.25.
Therefore, the price changed over the 4 weeks period by $0.25.


Part 2:

After the 4 week the change in price is given by 1.25 - 3.125 + 0.625 + 1.5 = 0.25.

Therefore, the price increased over the 4 weeks period.


Part 3:

Given that the price of 1 gram of gold was $39.28 at the end of week 4. since the price of 1 gram of gold increased by $0.25 over the 4 weeks period, the price of 1 gram of gold at the beginning of week 1 is given by:

39.28 - 0.25 = $39.03