Question

06) O estudo de sinal da função y= -x + 4 é dado por: * O a) y> 0 = x 0 = x < 4, y = 0 = x = 4, y < 0 = X > 4 O c))y> 0 = x > 4, y = 0 = x = 4, y = 0 = x < 4 O d) y> 0 = X > - 4, y = 0 = x = -4, y = 0 = x
POR FAVOR ME AJUDEM
URGENTEEE
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Answer 1

$\large\boxed{\begin{array}{l}\sf y=-x+4\\\sf c\acute alculo~da~ra\acute iz:\\\sf -x+4=0\\\sf x=4\\\sf f(x)>0~se~x<4\\\sf f(x)<0~se~x>4\\\huge\boxed{\boxed{\boxed{\boxed{\sf\maltese~alternativa~b}}}} \end{array}}$