الاون لاين --- مساعدتكم(*_*)

[المـHــا]

وهذي هي السؤالين سؤال 9 و10 من الاون لاين
Find an expression for the function whose graph is the line segment joining the points (1, -5) and (5, 9). (Assume that these points are in the form (x, f(x)).)




وهذا الثاني
Find an expression for the function whose graph is the top half of the circle x2 + (y - 4)2 = 9.