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 Lines of best fit 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/e/linear-models-of-bivariate-data 2026-05-04T16:10:46.51963925Z Estimating slope of line of best fit Given a scatter plot, can you estimate the slope of the line of best fit that goes through the data points? pstinchcombe 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 Lines of best fit https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-data/cc-8th-line-of-best-fit/e/equations-of-lines-of-best-fit-to-make-predictions 2023-12-11T22:13:00.981327266Z Estimating equations of lines of best fit, and using them to make predictions Practice estimating the equation of a line of best fit through data points in a scatter plot. Then, use the equation to make a prediction. Jeff exercise https://www.khanacademy.org/math/statistics-tx/x2d551a71b7f6c307:unit-3-two-variable-data/x2d551a71b7f6c307:lines-of-best-fit/v/comparing-methods-for-determining-best-fit 2026-06-23T13:38:27.041531116Z Comparing methods for determining best fit In this video, Sal compares and contrasts different methods used to determine a line of best fit, including least squares, median-median, and least absolute value regression. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/a7d6c262-10a3-4d26-851f-78edac961be5_1280_720_base.png Comparing methods for determining best fit In this video, Sal compares and contrasts different methods used to determine a line of best fit, including least squares, median-median, and least absolute value regression. https://cdn.kastatic.org/ka-youtube-converted/QkRX8vSmSJc.mp4/QkRX8vSmSJc.mp4 127 Lines of best fit https://www.khanacademy.org/math/statistics-tx/x2d551a71b7f6c307:unit-3-two-variable-data/x2d551a71b7f6c307:lines-of-best-fit/e/compare-methods-for-determining-best-fit 2026-06-23T13:53:18.04011831Z Compare methods for determining best fit Compare different methods for determining best fit, including median-median and absolute value Nate Kinast exercise