如何不使用表格绘制y=ax+b？

GeoGebra 命令及参数

1. Textfield(a) → ChampTexte1
2. Textfield(b) → ChampTexte2
3. Vector(A, AA) → u
4. Polygon(D, E, F) → t1, f_1, d, e
5. Vector(D, AA) → v
6. Translate(D, Vector[(If[o < 5, 0, If[5 < o < 15, (o - 5) / 10, 1]] * v)]) → D'
7. Translate(E, Vector[(If[o < 5, 0, If[5 < o < 15, (o - 5) / 10, 1]] * v)]) → E'
8. Translate(F, Vector[(If[o < 5, 0, If[5 < o < 15, (o - 5) / 10, 1]] * v)]) → F'
9. Polygon(D', E', F') → t1', f', d', e'
10. Translate(A, Vector[(If[o ≤ 10, o / 10, 1] * Vector[A, AA])]) → A'
11. Translate(AA, Vector[(If[o < 15, 0, (3 * (o - 15) / 10)] * Vector[AA, C])]) → AA'
12. Translate(AA, Vector[(-((If[o < 15, 0, (3 * (o - 15) / 10)] * Vector[AA, C])))]) → AA'_1
13. Segment(AA', AA'_1) → g
14. Midpoint(E, F) → G
15. Midpoint(E', F') → H
16. Vector(K, L) → c
17. Vector(I, M) → w
18. Midpoint(D, E) → N