A certain quadratic function has x-intercepts at 2 and 3. What are the x-coordinates of its vertex?
a) 5/2 because by symmetry, both x-intercepts should be the same vertical distance from the vertex point which is at x = 5/2 or 2.5.

b) 7/2 because by symmetry, both x-intercepts should be the same vertical distance from the vertex point which is at x = 7/2 or 3.5.

c) 5/2 because by symmetry, both x-intercepts should be the same horizontal distance from the axis of symmetry at x = 5/2 or 2.5.

d) 7/2 because by symmetry, both x-intercepts should be the same horizontal distance from the axis of symmetry at x = 7/2 or 3.5.