Siva_07

i couldnt find this answer in bb math solution thread

p.532 # 8

please help me

it says

the figure above shows the graph of a quadratic function f that has a minimum at the point (1,1) if f(b) = f(3), which of the following could be the value of b?

gcf101

The line x=1 passing through the vertex of parabola is the line of symmetry.
Symmetrical to x=3 in respect to x=1 is x=-1,
so f(3) = f(-1), b=-1.

In a "normal" language.
f(3)=5 (see the graph), there are two points with y=5: (3,5) and (-1,5) (both marked!),
f(-1) = 5 and b=-1

Siva_07

wow.... am i stupid or what

Siva_07

Thank you so much tho