线性方程斜率与截距复习

GeoGebra 命令及参数

1. RandomElement({0, -4, -3, -2, 1, 0, 1, 2, 3, 4, 1 / 2, 1 / 3, 1 / 4, 3 / 4, 1 / 5, 2 / 3, 1 / 5, 2 / 5, 3 / 5, 4 / 5, -1 / 2, -1 / 3, -1 / 4, -3 / 4, -1 / 5, -2 / 3, -1 / 5, -2 / 5, -3 / 5, -4 / 5}) → m
2. Random(-6, 7) → c
3. Expand(Simplify[(m * x) + c]) → f
4. Random(-6, 7) → a
5. RandomElement({1, 2, 3, 4, 5, 6}) → b
6. Random(-7, 9) → c_1
7. If(counter < 5, 1, If[counter < 8, 2, 3]) → type
8. If(type ≟ 1, m, If[type ≟ 2, m_d, m_d]) → m_s
9. If(m_s ≟ m_{ans}, true, false) → answergradientcorrect
10. If(type ≟ 1, c, c_d) → c_s
11. If(c_s ≟ c_{ans}, true, false) → answeryinterceptcorrect
12. Textfield(textanswergradient) → InputBox1
13. Textfield(textansweryintercept) → InputBox2
14. Expand(Simplify[(m_s * x) + c_s]) → f_s
15. Coefficients(f) → l1
16. If(m ≟ 0, "", If[abs(m) ≟ 1, If[m > 0, "x", "-x"], If[m > 0, "" + (FractionText[abs(m)]) + "x", "-" + (FractionText[abs(m)]) + "x"]]) → textCoeffX
17. If(c ≟ 0, "", If[m ≟ 0, If[c > 0, "" + (FractionText[abs(c)]), "-" + (FractionText[abs(c)])], If[c > 0, "+" + (FractionText[abs(c)]), "-" + (FractionText[abs(c)])]]) → textConst
18. If(c_s ≟ 0, "", If[m_s ≟ 0, If[c_s > 0, "" + (FractionText[abs(c_s)]), "-" + (FractionText[abs(c_s)])], If[c_s > 0, "+" + (FractionText[abs(c_s)]), "-" + (FractionText[abs(c_s)])]]) → textConst_s
19. If(m_s ≟ 0, "", If[abs(m_s) ≟ 1, If[m_s > 0, "x", "-x"], If[m_s > 0, "" + (FractionText[abs(m_s)]) + "x", "-" + (FractionText[abs(m_s)]) + "x"]]) → textCoeffX_s
20. Intersect(f_s, yAxis) → A
21. If(f_s(Max[Denominator[m_s], 4]) > 10, (-Max[Denominator[m_s], 4]), Max[Denominator[m_s], 4]) → x_{P}
22. If(x(A) > x(P), Vector[P, (x(A), y(P))], Vector[A, (x(P), y(A))]) → u_{AP}
23. If(x(P) > x(A), Vector[If[y(P) > y(A), Vector[(x(P), y(A)), P], Vector[(x(P), y(A)), P]]], Vector[If[y(P) > y(A), Vector[(x(A), y(P)), A], Vector[(x(A), y(P)), A]]]) → v_{AP}
24. Text(If[m_s < 0, "−", ""]) → textGradientSign
25. Text("run = " + (Length[u_{AP}])) → textRun
26. GCD({abs(a), abs(b), abs(c_1)}) → hcf