Algebra

Let P = ( x, y ) be a point on the graph of y = x^2 – 8.
(a) Express the distance d from P to the point (0,-1) as a function of x

(b) What is d if x = 0?

(c) What is d if x = -1?

(d) Use a graphing utility to graph d = d(x)

(e) For what values of x is d the smallest?