What is the answer for 10,11, and 12?

Read the situations in the table below. then drag a graph and equation to represent each situation. indicate whether each of the relationships is proportional or non-proportional. edit : i got the right answer its attached

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]