<span>ax^2+bx+c
x^2-4x+3
(x-3)(x-1)=0
x=3, x=1 when y=0
The graph of the parabola has a minimum because a is positive.
(3+1)/2=2 so y will be at a minimum when x=2
f(x)=y=2^2-(4*2)+3
=4-8+3</span>
$6.25 is the price it will cost for 15 sq ft
B) because since the 40 cars averaged 49 mph it means that, that is the number that most cars have around the same speed of
