Daegu
The Pearson correlation coefficient of the annual average wind speed in Daegu and year is –0.50, which has a distinct negative linear relationship. This means that year and annual average wind speed have a distinct relationship. The slope of the trendline of the annual average wind speed graph in Daegu is –0.0176, which is a negative number. This means that annual average wind speed is decreasing over the years.
The Pearson correlation coefficient of the annual average find dust concentration in Daegu and year is –0.95, which has a strong negative linear relationship. This means that year and annual average find dust concentration have a strong relationship. The slope of the trendline of the annual average find dust concentration graph in Daegu is –1.4811, which is a negative number. This means that annual average find dust concentration is decreasing over the years.
1. Wind Speed
The month with the largest slope is July, which is –0.0331. The month with the smallest slope is December, which is –0.0071. In other words, it can be seen that the average wind speed decreased the most in July and decreased the least in December.
2. PM10
The month with the largest slope is March, which is –2.074. The month with the smallest slope is August, which is –1.05. In other words, it can be seen that the average find dust concentration decreased the most in March and decreased the least in August.