Concavity of Functions Over Their Domains Practice Test

Concave down on $(-\infty,\infty)$; concave up on no interval

Concave down on $(-\infty,0)$; concave up on $(0,\infty)$

Concave up on $(0,\infty)$; concave down on $(-\infty,0)$

Concave up on $(-\infty,0)$; concave down on $(0,\infty)$

Concave up on $(-\infty,\infty)$; concave down on no interval