Question 987326
f(x)=2x+1, x <=4
=x^2+12  for x>4.
No.  At x at 4.01, for example, or any value greater than 4 the function jumps from 9 to over 16. The graph is of both functions, but at 4 is what the current problem is dealing with.

{{{graph(300,200,-10,10,-10,100,2x+1,x^2+12)}}}