19. Quadratic Equations and Functions

State the vertex, intercepts, and domain & range for each quadratic.

$G\left(x\right)=3(x-6{)}^2$

State whether the graph of $f\left(x\right)$ will be narrower or wider than $g\left(x\right)=x^2$ & if it opens up or down.

$f\left(x\right)=-\frac{3}{7}{x}^2$

State the vertex, axis of symmetry, and domain & range for each quadratic.

$y=-x^2-21$