Find expressions for the quadratic functions whose graphs are shown. So I got f(x)=3(x-5)^2 and g(x)=-7.5=a^2+b and they're both wrong so any help is appreciated. edit:Yes I've seen the other posts but don't know how to apply to these problems.
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$$f(x)=2(x-5)^2$$ since $f(6)=2$
$y=ax^2+bx+c$ $11=a(-4)^2+b(-4)+c$ $1=a(0)^2+b(0)+c$ $-6.5=a(1)^2+b(1)+c$ second equation simplifies to $c=1$ solve the system of equations for the coefficients $a$ and $b$ formed by the other two equations.