@options; repereortho(150,150,1 0,2,2); @figure; A = point(-14,10) {i}; B = point(-8,10) {i}; sAB =segment(A,B); C = point(-14,8) {i}; D = point(-8,8) {i}; sCD =segment(C,D); P =pointsur(sAB,0.76) {2,sansnom}; Q =pointsur(sCD,0.67) {2,sansnom}; var a =tan(180*(AP/AB-1/2)); texte1 =texte(-6,12,"coefficient directeur : $a$") {violet,dec1}; var b =12*(CQ/CD-1/2); texte2 =texte(-6,10,"ordonnee a l'origine : $b$") {violet,dec1}; var c =a+b; M = point(0,b) {i}; N = point(1,c) {i}; dMN =droite(M,N) {0x009933,2,sansnom}; texte3 =texte(-12,14,"Representation de f(x) = $a$x + $b$") {orange,dec1};