Try this option: 1. for vertex (2;1) the first equation is: h=-b/2a, it means 2=-b/2a or b=-4a; 2. for vertex (2;1) the second equation is: ax²+bx+c=y, it means 1=4a+2b+c; 3. for point (6;7) the third equation is: ax²+bx+c=y, it means 7=36a+6b+c. 4. using three equation, it is possible to make up the system of equations (and solve it). Details are in the attached picture. answer: [tex]y= \frac{3}{8}x^2 - \frac{3}{2}x + \frac{5}{2} [/tex] The graph is in the attachment.
