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.

$$f(x)=2(x-5)^2$$

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.