How do you find the quadratic function given the vertex (2,-4) and the point (1,-1)?
1 Answer
Feb 12, 2016
Explanation:
the standard form of a quadratic function in ' vertex form' is :
y
#= a(x - h)^2 + k #
where (h , k ) are the coords of the vertex.hence :
#y = a(x - 2 )^2 - 4 # the other point on the function (1 , -1 ) allows a , to be found.
so -1 = a - 4 → a = 3
