If an instrument measures in units of 1 then any value between which two values would be measure as 5? a) 3.5 and 6.5
b) 4 and 6
c) 4.5 and 5.5
d) 5 and 6

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.