Question

Find an expression for the function whose graph is the bottom half of the parabola x + (y - 8)2 = 0.

Answer 1

x + (y - 8)^2 = 0
(y - 8)^2 = -x
y - 8 = √-x
y = √-x + 8

Required equation is y = √-x + 8        x ≤ 0