See graph below
Explanation:
Let's select four points:
I picked perfect square 4 and 9 to make the calculation easier
x = 0, 4, 9, 12
when x = 0
f(x) = √0 - 3 = -3
when x = 4
f(x) = √4 - 3 = 2 - 3 = -1
when x = 9
f(x) = √9 - 3 = 3 - 3 = 0
when x = 12
f(x) = √12 - 3 = 0.46
Plotting the four points on the graphs:
