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:
-9/13
Step-by-step explanation:
The formula for slope is [ y2-y1/x2-x1 ].
10-(-3)/-5-4
13/-9
-9/13
Best of Luck!
Answer:
Step-by-step explanation:
Janet uses less than 4 cups of flour because 3/8 is less than one.