Answer:
vertex = (0, -4)
equation of the parabola: 
Step-by-step explanation:
Given:
- y-intercept of parabola: -4
- parabola passes through points: (-2, 8) and (1, -1)
Vertex form of a parabola: 
(where (h, k) is the vertex and
is some constant)
Substitute point (0, -4) into the equation:

Substitute point (-2, 8) and
into the equation:

Substitute point (1, -1) and
into the equation:

Equate to find h:

Substitute found value of h into one of the equations to find a:

Substitute found values of h and a to find k:

Therefore, the equation of the parabola in vertex form is:

So the vertex of the parabola is (0, -4)
answer:
140 scoops
explanation:
3/4 of 80 is 20 and 1/2 of 60 is 30. when you add 80 and 60 you get 140
Just draw the graphs, and you should find y = 10x² is the only graph narrower than the given one.
So use -a/b and you get 6x as the slope and the parallel line would have the same slope
The second line since it have marks on -1 and on 2