Please help me the question is in the picture and the answers are one of the below

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

Me, the vertices of quadrilateral coat are c(2,0), o(7,0), a(7,2) and t(2,2). prove that coat is a rectangle.

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible