The vertex of the parabola is between the shortest line connecting its focus and directrix, so between (0, -4) and y = 4 is the point (0, 0), which is the vertex of the parabola. Also, this parabola faces downward.
The general formula for a parabola that faces downward is y = -4cx^2, where c is the distance from the vertex to either to focus or the parabola. Since c = 4, the equation is y = -16x^2, which is choice A.
Answer:
look up the paper because i had that same paper
Step-by-step explanation:
Answer:
18 inches
Step-by-step explanation:
54*1/3=18(inches)
Answer:
(-3, 4)
It doesn't show any coordinates so I assume that the origin is where the x and y axes intercept