线性回归与几何图形交互演示

GeoGebra 命令及参数

1. RandomElement({1 / 3, 1 / 3}) → m
2. Random(33, 37) → c
3. Sequence(40, 60, 5) → lx
4. Length(lx) → nx
5. Sequence((Element[lx, i], f(Element[lx, i])), i, 1, nx) → l5
6. Sequence(round(y(Element[l5, i]) + ((-1)^(Random[1, 2]) * Random[0, 1])), i, 1, nx) → ly1
7. Sequence((Element[lx, i], Element[ly1, i]), i, 1, nx) → l1
8. Random(0, 10) → a
9. ResidualPlot(l1, f) → l2
10. Sequence(y(Element[l2, i]), i, 1, nx) → l3
11. Sequence(Element[l3, i]^(2), i, 1, nx) → l4
12. Sum(l4) → b
13. Sequence(Segment[Element[l1, i], Element[l5, i]], i, 1, nx) → l6
14. PMCC(l1) → d
15. RandomElement({30, 35, 65}) → e
16. FitLineY(l1) → g
17. Join({{"x, km/h"}, lx}) → l8
18. Join({{"y, km/litre"}, ly1}) → l9
19. TableText(l8, l9, "c|_") → text4
20. TableText(l7) → text9
21. Midpoint(Element[l7, 1], Element[l7, 2]) → A