graphing a square root function

Question

graph the leftmost point and three additional points f(x)= square root x-3

Answer 1

f(x) = sqrt(x-3)

domain is x-3>0

x>3

open circle at (3,0)

x=7 ---> ssqrt(7-3) = sqrt(4) = 2 , so (7,2)

x=12 ---> sqrt(12-3) = sqrt(9) = 3 , so (12,3)

x=19 ---> sqrt(19-3) = sqrt(16) = 4, so (19,4)

x = 28 ---> sqrt(28-3) = sqrt(25) = 5, so (28,5)