Sketch a graph so you can find the vertex and determine if the parabola is horizontal or vertical. When i graph (-2,4) and then y=6, I find the middle is (-2,5) so that will be the vertex. The distance to the vertex is -1 so 4p=-4.
My formula is (x-h)^2=4p(y-k), now just plug in numbers. You should end up with (x+2)^2=-4(y-5).
Some instructors want you to write (y-k)=1/(4p)(x-h)^2 which is the same thing, so check to see which one you should be using.
Gradient
= (y2-y1)/(x2-x1)
= (-9-(-5))(-2-(-4))
= (-4)(2)
= -8
You need to find D first, after you find D plug it into the equation:
y= d (250)+300
im not sure this is right but try it out, hope it helps
Boys= n
Girls= 2n +3
n +2 n +3 = 3n+3
24-3= 3n
21= 3n
21/3= n
n=7
There are 7 boys in the class and 17 girls
He increased 30% so that means he can bench press 180lbs
