Correct answer only !

which graph represents the function?

f(x) = 2√x + 1

 (C) bottom left graph

Step-by-step explanation:

f(x)=2√x + 1

The number inside the square root symbol must be greater than or equal to zero, so there is a restriction on x.  x ≥ 0

The only graphs that satisfy this restriction are graphs C and D.

The restriction on "x" creates a restriction on "y".  Since x≥0, then:

f(0) ≥ 2√0 + 1

f(0) ≥ 1

So, y must be greater than or equal to 1.  The only graph that satisfies thie restriction is the graph on the bottom left.

arc length = radius * x ( in radians)

6 * pi = 18 * x

divide by 18 on each side

6 pi / 18 = x

pi/3 = x

the angle is pi / 3 radians

or   60 degrees