Hi Disregard comment. Tutors with same solution :) Using the vertex form of a parabola,where(h,k) is the vertex Vertex (2,1) y = a(x-2)^2 + 1 P(3,5) 5 = a+ 1 4= a and Standard form: y = 4(x^2 -4x + 4) + 1 = 4x^2 -16x + 16 + 1= 4x^2 -16x + 17 Wish You the Best in your Studies.