So when looking at this it says that he drives at a constant speed, so his speed won't change. So If he is trying to drive 306 miles at 36mph, we would divide his speed by the distance.
306/36
And when we do this, we get 8.5. So it would take him eight and a half hours to drive 306 miles.
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.