bonjour
h (x)= 7 x + 3
h ( 3) = 21 + 3 = 24
h ( 2) = 14 + 3 = 17
( 24 - 17 ) / ( 3 - 2 ) = 7/1 = 7
h ( 5) = 35 + 3 = 38
h ( - 1) = - 7 + 3 = - 4
( 38 + 4 ) / ( 5 + 1 ) = 42/6 = 7
h ( - 3) = - 21 + 3 = - 18
h ( 4) = 28 + 3 = 31
( - 18 - 31 ) / ( - 3 - 4 ) = - 49/- 7 = 7
tu remarques que l'on obtient le même résultat