Question

Which of the following functions are graphed below

Answer 1

Its the second one, x^2+4, x<2        x+4, x>=2, because the full circle on the graph represents >= and the empty circle represents <. 

Answer 2

we know that it is x<2 and x
`\geq 2`. and when x is less than 2 it is x^2+4. and when x is equal or greater than 2 it is x+4

so B.