题目

Mr. and Mrs. Moore were invited to a Christmas party at a hotel one year. They 36    their car outside and went  in. Mr. Moore had never got drunk before, so he was  37    not to drink too much,  38     his friends asked him to drink more   39    . During the party, Mrs. Moore found that she had   40      to bring her bag, so she asked her husband to go out to the car and  41   it for her. He  42      so, but on his way back to the hotel gate, he heard a car born(喇叭) blowing near his own car. He thought  43    might be in need of help and went正方形的边长为4，当边长增加x时，面积增加y，求y关于x的函数的关系式，这个函数是二次函数吗？