Quadratic functions: vertex form
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identifying the vertex
the vertex form of a quadratic function is f(x) = a(x-h) +k.
what is the vertex of f(x)=6

(5, -9).

Step-by-step explanation:

The vertex  if (h, k).

So for 6(x - 5)^2 - 9 the vertex is the point (5, -9).

the f

last graph i believe

step-by-step explanation:

worked it out i believe

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.