bonjour

tableau

f ( 1) =  5

f ( -2) = -  2

formule

g (1) = 3 - 4 = - 1

g ( - 2) = - 6 - 4 = - 10

courbe

h (1) =  1

h ( - 2) =  2

5 x + 13  = 49

5 x = 49 - 13

5 x =  36

x = 36/5 = 7.2