A parabola opening up or down has vertex (0,0) and passes through (20,20). Write its equation in vertex form.
+36916 Vertex at 0,0 and includes 20,20 obviously is opening UPWARD....like a bowl
-b/2a = 0 so b = 0 h, k = 0 , 0
ax^2 = 20
a20^2 = 20
a = 20/400 = .05
y = .05 x^2 or y= .05(x-0)^2 + 0
Graph:
https://www.desmos.com/calculator/f5ghmltx1e
