You can use a graph to evaluate functions. Identify the
of a point on the
graph. The input is the
--coordinate and the output
is the-_-coordinate.
udy
ide

Given that y varies directly to the square root of (x + 1), and that y = 1 when x = 8,(a)express y in terms of .x,(b)find the value of y when x = 3,(c)find the value of x when y = 5.