47.5 meters per second, and he will travel 237.5 meters in 5 seconds
The correct answer to this question is 6 in
Hello,
As (2,-4) is the vertex, the parabola is y=k(x-2)²-4
As (3,-1,) is a point of the parabola:
-1=k*(3-2)²-4
==> k=3y=3(x-2)²-4 so, coefficient of x² is 3.