Simplify Please and Thank you!

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

Which expression shows the sum of the polynomials with like terms grouped together

The diagonals of a quadrilaretral intersect at (-1,4). one of the sides of the quadrilateral is bounded by (2,7) and (-3,5) determine the coordinates of the other side in order for the quadrilaretral to be a square.