绝对值函数图像绘制（含变换）

GeoGebra 命令及参数

1. Point(Segment[(h + 1, y(C) + 10), (h + 1, y(C) - 10)]) → D
2. Line(A, B) → f
3. Vector(A, C) → u
4. Polygon(A, C, B) → t1, b, a_1, c
5. RotateText(text2, π / 2) → text3
6. Segment(A, C) → h_{1}
7. Vector(C, D) → v
8. Vector((h, 0), A) → w
9. Vector((0, 0), (h, 0)) → j
10. RandomElement({-8, -7, -6, -5, -4, -3, -2, -1, 1, 2, 3, 4, 5, 6, 7, 8}) → n
11. Random(-8, 8) → o
12. Random(-8, 8) → p
13. If(h ≟ o, "Horizontal shift is correct!", "Horizontal shift is not correct.") → text9
14. If(n ≟ rise, "Vertical stretch is correct!", "Vertical stretch is not correct.") → text10
15. If(p ≟ y(A), "Vertical shift is correct!", "Vertical shift is not correct.") → text11