Based on the picture, why is the following quadrilateral a parallelogram?

please help!

Which graph corresponds to the function f(x) = x2 + 4x – 1?

The table shows the results of three plays in a football game. what is the net result of the three plays? football game 1st play 5 yards 2nd play -9 yards 3rd play 12 yards

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)