input courbescp13; beginfig(1); cadre((0,0),(18,8)); origine((9,4)); unites(4,2); draw millimetrepourcourbe withcolor orange; draw axes; graduationx(btex 1 etex,1); graduationy(btex 1 etex,1); drawoptions(withpen pencircle scaled1.5bp); draw courbe1(-9,9,100,2*x); draw courbe3(-9,9,100,-2+2*x); draw courbe4(-9,9,100,x**2-2*x-1); draw courbe2(-9,9,100,2-x); draw courbe5(-9,9,100,-0.5*x); draw courbe6(-9,9,100,0.25*x-1); draw labelise1(btex courbe 1 etex,0.455); draw labelise2(btex courbe 2 etex,0.6); draw labelise3(btex courbe 3 etex,0.6); draw labelise4(btex courbe 4 etex,0.45); draw labelise5(btex courbe 5 etex,0.4); draw labelise6(btex courbe 6 etex,0.6); endfig; end