比例关系图像测验：用几何构造理解线性函数

GeoGebra 命令及参数

1. PointIn(g_1) → D
2. Random(1, 15) → y_1
3. Random(1, 15) → x_1
4. Random(20, 75) → k
5. Dilate(B, If[0 < a ≤ 1, 1 - a, 0], A) → B'
6. Vector(B, B') → u
7. Dilate(A, If[2 < a ≤ 3, 3 - a, 0], (0, y(D))) → A'
8. Vector(A, A') → v
9. Dilate(A', If[3 < a ≤ 4, 4 - a, 0], D) → C'
10. Dilate(D, If[5 < a ≤ 6, 6 - a, 0], (x(D), y(D) + y(A'))) → D'
11. Vector(D, D') → c
12. Dilate(D', If[6 < a ≤ 7, 7 - a, 0], (x(D') + x(D), y(D'))) → E'
13. Dilate(A, If[8 < a ≤ 9, 9 - a, 0], D) → A'_{1}
14. Segment(A, A'_{1}) → g
15. Dilate(D, If[9 < a ≤ 10, 10 - a, 0], E) → D'_{1}
16. Random(-10, 10) → b_1
17. Random(-10, 10) → n_1
18. Random(1, 10) → d_1
19. If(s ≥ 0, "earn", "lose") → text7
20. If(d > 1, "hours", "hour") → text8
21. Textfield(p) → InputBox3
22. Textfield(o) → InputBox1
23. If(o ≟ n_1 / d_1, "Yes!", "no") → text9
24. If(p ≟ q, "Yes!", "no") → text10
25. Vector(A', C') → w
26. Vector(D', E') → e
27. Dilate(D, If[9 < a ≤ 10, 10 - a, 0], E') → D'_{2}
28. Segment(D, D'_{2}) → h