https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-data/cc-8th-line-of-best-fit/v/estimating-the-line-of-best-fit-exercise 2023-05-12T21:01:01.897246564Z Estimating the line of best fit exercise The "line of best fit" is a line that shows the pattern of data points. If we can find a good line, it means there is a linear trend. If not, it means there is no linear trend. We can't ignore points that don't fit the trend. Sal Khan video https://cdn.kastatic.org/googleusercontent/yMNzEamJCQT7A1xvGsloyZpWmvtEQ2nBGFUkm3ccmtXOwVO0Q6DuShSdnqkmswqKPzYy2i8z1R8VYXresfBm2SU Estimating the line of best fit exercise The "line of best fit" is a line that shows the pattern of data points. If we can find a good line, it means there is a linear trend. If not, it means there is no linear trend. We can't ignore points that don't fit the trend. https://cdn.kastatic.org/ka-youtube-converted/ioieTr41L24.mp4/ioieTr41L24.mp4 77 Line of best fit https://www.khanacademy.org/math/statistics-probability/describing-relationships-quantitative-data/introduction-to-trend-lines/a/linear-regression-review 2024-11-11T02:56:25.272408758Z Linear regression review Linear regression is a process of drawing a line through data in a scatter plot. The line summarizes the data, which is useful when making predictions. article https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-data/cc-8th-line-of-best-fit/e/plotting_the_line_of_best_fit 2026-03-31T14:59:02.026924717Z Eyeballing the line of best fit Given a random assortment of points, draw a line of best fit through them. Sid Patel exercise https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-data/cc-8th-line-of-best-fit/v/smoking-1945-extrapolation 2023-05-12T21:01:01.897246564Z Line of best fit: smoking in 1945 The scatter plot shows how many adults in America smoked from year to year. We can guess how many smoked in 1945 by drawing a line that slopes down through the points. Then we see how high the line would be 20 years earlier. Sal Khan video https://cdn.kastatic.org/googleusercontent/yZKpVENPaJ0cbI753S0lV0n5d0Bn6Hvs8N4MtCyo9VXE_X59LGtcs5xHl0jUv294K8q-S8pg6YeAVll59ZXn9-6d Line of best fit: smoking in 1945 The scatter plot shows how many adults in America smoked from year to year. We can guess how many smoked in 1945 by drawing a line that slopes down through the points. Then we see how high the line would be 20 years earlier. https://cdn.kastatic.org/ka-youtube-converted/d4WE4SnhBDU.mp4/d4WE4SnhBDU.mp4 287 Line of best fit https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-data/cc-8th-line-of-best-fit/v/interpreting-trend-line 2023-05-12T21:01:01.897246564Z Interpreting a trend line The graph shows how studying affects test scores. The line slope of 15 means that for each extra hour of studying, there is usually a 15-point increase in test score. But it's not a guarantee. Some students may do better or worse than the trend. Sal Khan video https://cdn.kastatic.org/googleusercontent/q6LtptyvaCJtK4B65rKXTxIBmuj58LNfXUvDVnBXexPpKLWuKR_luyJu8lkPcR8AVjDN0bE-8rHBTxpN9Zm7lrls Interpreting a trend line The graph shows how studying affects test scores. The line slope of 15 means that for each extra hour of studying, there is usually a 15-point increase in test score. But it's not a guarantee. Some students may do better or worse than the trend. https://cdn.kastatic.org/ka-youtube-converted/mfX_yUvwJho.mp4/mfX_yUvwJho.mp4 208 Line of best fit