Answer: (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.
