Understanding Average Weekly Change in Price

The video tutorial explains how to calculate the average weekly change in the price of an MP3 player over a seven-week period. It starts with the problem statement, followed by an explanation of the average rate of change. The tutorial then demonstrates the calculation of the change in price using delta notation and concludes with the final calculation and interpretation of the results. It also discusses alternative ways to express the average weekly price change, emphasizing the importance of the negative sign to indicate a decrease in price.

What was the initial price of the MP3 player?

• $150

• $100

• $200

• $184

Over how many weeks did the price of the MP3 player change?

• 8 weeks

• 5 weeks

• 6 weeks

• 7 weeks

What does the average rate of change represent in this context?

• The total price of the MP3 player

• The weekly increase in price

• The weekly decrease in price

• The total number of weeks

How do you calculate the change in price?

• Add the new price to the original price

• Subtract the new price from the original price

• Multiply the new price by the original price

• Divide the new price by the original price

What is the change in price from $184 to $100?

• -$100

• $100

• -$84

• $84

What is the average weekly change in price of the MP3 player?

• $84 decrease per week

• $84 increase per week

• $12 decrease per week

• $12 increase per week

Why is it important to include the negative sign in the result?

• It shows the total price

• It shows the number of weeks

• It indicates the price is decreasing

• It indicates the price is increasing

How can the average weekly change be expressed without using a negative sign?

• By stating the price is constant

• By stating the price is decreasing

• By stating the price is increasing

• By stating the price is fluctuating

What would be incorrect to say about the weekly price change?

• The price is decreasing by -$12 per week

• The price is decreasing by $12 per week

• The price is increasing by $12 per week

• The price is constant

What is the final takeaway from the video?

• The price is fluctuating

• The price is decreasing

• The price is constant

• The price is increasing