Question

I inserted a picture of the question, i can give you the answer to question 2 if it helps

Answer 1

For this case we have the fllowing points given:

A =(60,0)

B= (30,45)

C=(0,0)

The equation is given by:

y= a (x-0)*(x-60)= ax(x-60)

Solving for a we got:

`a=(y)/(x(x-60))`

We can use the vertex: (30,45) and we have:

`a=(45)/(30(30-60))=-(1)/(20)`

Then the equation is:

`y=-(1)/(20)x(x-60)`

And the plot is: