给定两点写出直线方程（y截距为整数）

GeoGebra 命令及参数

1. Sequence(i, i, -10, 10, 1) → ylist
2. Sequence(i, i, -4, -1, 1) → Xleftfinal
3. Sequence(i, i, 1, 4, 1) → Xrightfinal
4. Union(Xleftfinal, Xrightfinal) → Xlistfinal
5. Sequence(i, i, -10, 10, 1) → xlist
6. RandomElement(Xlistfinal) → a
7. Sequence(i, i, a + 1, 10, 1) → xlist2
8. Sequence(i, i, -10, a - 1, 1) → xlist1
9. Union(xlist1, xlist2) → list1
10. RandomElement(list1) → c
11. RandomElement(ylist) → b
12. RandomElement(ylist) → d
13. FractionText(e) → text1
14. FractionText(g(0)) → text8
15. Random(-20, 20) → h
16. RandomElement(scalarlist1) → j
17. Line(A, B) → m
18. RandomElement(list2) → sc
19. FractionText(Slope[m]) → text10
20. Union(xlist1, xlist2) → list3
21. Textfield(f) → InputBox1