Ineed this question is worth 15 points.

answer:

c

step-by-step explanation:

3.5 miles is a given starting point, since that is the distance he has traveled so far. you cannot travel a negative distance, unless you were traveling from your office back to home. 100 miles every two hours = 50 miles every hour.

y (distance traveled) = 3.5 (miles already traveled) + 50x (50 miles traveled per hour from the 3.5 miles starting point)

y = 3.5 + 50x is your answer.

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this