How dose the maping diagram of a function of a relation that is not a function differ from a maping diagram of a function

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

Secant be and cf intersect at point d inside a what is the measure of cde

Julia bought 7 hats a week later half of all her hats were destroyed in a fire. there are now only 12 hats left with how many did she start