f(x) = -4x - 7
si x = 8 => f(8) = -4*8 - 7 = -32 - 7 = -39
si x = -4 => f(-4) = -4*(-4) - 7 = 16 - 7 = 9
si x = -2 => f(-2) = -4*(-2) - 7 = 8 + 7 = 1
si x = 3/2 => f(3/2) = -4*3/2 - 7 = -6 - 7 = - 13
si x = -1/3 => f(-1/3) = -4*(-1/3) - 7 = 4/3 - 7 = 4/3 - 21/3 = -17/3
fonction affine :
selon ton cours : a la forme : f(x) = ax + b
a = oui
b = non
c = non
d = oui puisque k(x) = 1/2x - 5
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f(x) = -4x - 7
si x = 8 => f(8) = -4*8 - 7 = -32 - 7 = -39
si x = -4 => f(-4) = -4*(-4) - 7 = 16 - 7 = 9
si x = -2 => f(-2) = -4*(-2) - 7 = 8 + 7 = 1
si x = 3/2 => f(3/2) = -4*3/2 - 7 = -6 - 7 = - 13
si x = -1/3 => f(-1/3) = -4*(-1/3) - 7 = 4/3 - 7 = 4/3 - 21/3 = -17/3
fonction affine :
selon ton cours : a la forme : f(x) = ax + b
a = oui
b = non
c = non
d = oui puisque k(x) = 1/2x - 5