The vertex of this parabola is at (5, 5). when the x-value is 6, they-value is -1. what is the coefficient of the squared expression in the parabola's equation?
hello : the parabola's equation is : f(x) = a(x-5)²-5
the coefficient of the squared expression in the parabola's equation is : a
but ; f(6) = - 1
- 1 = a(6-5)²+5
a+5=-1.....a=-6
f(x) = -6(x-5)²+5
