https://r2.erweima.ai/mathbot/image/1727106604717qopwm7r0.jpg

Giả sử ta có chỉ số giá vàng giai đoạn 2014 đến 2020:

Lượng tăng tuyệt đối trung bình:

a.
0,22

b.
-0,15

c.
-0,22

d.
0,15

Based on the provided image, it shows the gold price index from the year 2014 to 2020. To find the average absolute change per year, we need to calculate the differences between each year's index and then compute the mean of these differences. Here's the calculation:

1. Differences between each consecutive year:
   - \(2015 - 2014 = 1.58 - 2.18 = -0.60\)
   - \(2016 - 2015 = 1.29 - 1.58 = -0.29\)
   - \(2017 - 2016 = 0.98 - 1.29 = -0.31\)
   - \(2018 - 2017 = 1.17 - 0.98 = +0.19\)
   - \(2019 - 2018 = 0.91 - 1.17 = -0.26\)
   - \(2020 - 2019 = 0.85 - 0.91 = -0.06\)

2. Absolute differences:
   - \(| -0.60 | = 0.60\)
   - \(| -0.29 | = 0.29\)
   - \(| -0.31 | = 0.31\)
   - \(| +0.19 | = 0.19\)
   - \(| -0.26 | = 0.26\)
   - \(| -0.06 | = 0.06\)

3. Calculate the average of these absolute differences:
   \[
   \text{Average absolute change} = \frac{0.60 + 0.29 + 0.31 + 0.19 + 0.26 + 0.06}{6} = 0.285 \, \text{(approximately)}
   \]

None of the provided answers in the question exactly match the calculated average absolute change of \(0.285\). Thus, it seems there might be a need to recheck the answers or the method of calculation used in the problem statement.

Would you like more details on this or have any other questions? Here are some related topics you might find helpful:

1. How to compute the rate of change for a data set.
2. Understanding price indices and their implications.
3. The concept of absolute versus relative change.
4. How to analyze time series data.
5. Statistical methods for economic data analysis.

**Tip:** When dealing with economic data, it's important to consider both the direction and magnitude of changes to fully understand the trends and their potential impacts.

Giả sử ta có chỉ số giá vàng giai đoạn 2014 đến 2020:
Lượng tăng tuyệt đối trung bình:
a. 0,22
b. -0,15
c. -0,22
d. 0,15

Calculate the average absolute change in the gold price index from 2014 to 2020 using time series data. Learn how to compute differences between consecutive years and find the average change. This problem is suitable for Grades 10-12 students.

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