Concavity ●Theorem O If f"(x)>0 for all value of x in I,then fis concave up on 2 O If f"(x)<0 for all value of x in I,then fis concave down on 2 Concavity - ⚫Theorem  If f ’’(x)>0 for all value of x in I, then f is concave up on I  If f ’’(x)<0 for all value of x in I, then f is concave down on I