The Correlation. Correlation is a measue of how close the line fits the points that you found in your experiment. Anyone can say whether they think the line is a good fit or not, but to measure it exactly, we use the correlation coefficient: R2.
As the seasons change and the amount of sunlight decreases, less chlorophyll is produced, and the leaves appear less green. Chlorophyll is broken down into simpler compounds at a constant rate, so green leaf color will gradually fade as chlorophyll production slows or stops.
In general, trees with greater exposure in any location are among the earliest changers and may even lose their leaves early if the weather is rainy or windy. But don't worry, the show is just getting started, and there are still billions of leaves left to change! The last few sunny days will be especially helpful in developing the red and orange colors. You can also keep track of fall colors by calling: Fall Foliage Report - 1.800.424.LOVE; Wonder how the leaves change color?