···Concavity of curve. Inflection point, concave down and concave up. Second derivative tangent lines of function. Mathematics resources for teachersRFID:Image ID:2RCX8R1PreviewSaveShareBuy the printImage detailsContributor:SAMYA JAKANE / Alamy Stock VectorImage ID:2RCX8R1Releases:Model - no | Property - noDo I need a release?