<font color='red'>Commentaires :</font> Ceci est un commentaire.

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def PlotEq(a,b,c):
    intersectx=[]
    intersecty=[]
    if (b!=0):
        intersectx=intersectx+[-3,3]
        intersecty=intersecty+[(-c+3*a)/b, (-c-3*a)/b]
    if (a!=0):
        intersecty=intersecty+[-3,3]
        intersectx=intersectx+[(-c+3*b)/a, (-c-3*b)/a]
    axis([-3,3,-3,3])
    plot(intersectx, intersecty)

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def PlotParam(p,v):
    intersectx=[]
    intersecty=[]
    if (v[0]!=0):
        intersectx=intersectx+[-3,3]
        intersecty=intersecty+[p[1]+(-3-p[0])*v[1]/v[0], p[1]+(3-p[0])*v[1]/v[0]]
    if (v[1]!=0):
        intersecty=intersecty+[-3,3]
        intersectx=intersectx+[p[0]+(-3-p[1])*v[0]/v[1], p[0]+(3-p[1])*v[0]/v[1]]
    axis([-3,3,-3,3])
    plot(intersectx, intersecty)