15. a) Write a function to represent the area of the rectangle. Show that the function fits the definition of a quadratic function. x +2 20 - 2X b) Graph the function. c) What do the x-intercepts represent in this situation? How do they relate to the dimensions of the rectangle? d) What information does the vertex give about this situation? e) What are the domain and range? What do they represent in this situation? f) Does the function have a maximum value in this situation? Does it have a minimum value? g) If you graph the function you wrote in part a) with the domain being the set of all real numbers, does it have a minimum value? Explain. 16. Does the function f(x) = 4x2 - 3x + 2x(3 - 2x) + 1 represent a quadratic function? Show why or why not using several different methods