Answer:
1)
1st graph below x-intercepts S={-7,-1}
2) Opens Down Vertex: (-2,4) Axis of Symmetry
x-intercept
B Domain:
Range
C This function increases from
And decreases from

Explanation:
1) The vertex of the parabola is found when we rewrite the common formula:
Into this way:
The Vertex is found by:

That's why we could rewrite the trinomial as this:

Give the equation of the parabola's axis of symmetry, this is given by tracing a vertical line through the parabola vertex.

The intercepts are the roots/zeros:

Domain:
Since the function has no restrictions therefore it is continuous and defined for any value of x ∈ Real Set

Range
As the minimum point -9 is lowest y-coordinate the Range includes this value up to infinite values

(First Graph)
2)

As the parameter a <0 then the graph opens down.
Vertex:

Axis of Symmetry

x-intercept

y-intercept
c=0 then (0,0).
B Domain:
Similarly, since the function has no restrictions therefore it is continuous it is defined for any value of x ∈ Real Set

Range
![R=(-\infty,4]](https://img.qammunity.org/2020/formulas/mathematics/college/72p1nl0zw1tbkv5t34notxm8h7ltpmevyo.png)
C
This function increases from
Or we can represent this interval like this:
And decreases from
