The table below displays the enrollment of freshmen taking Algebra 1. Geometry, or Algebra 2. The total number of girls enrolled is equal to the number of boys.
There are twice as many boys enrolled in Algebra 1 as boys enrolled in Geometry.
Based on this information, complete the two-way table below.

For boys, its 92, 46, and 12

For Girls its 68

And For the Totals its 100

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