The answer is 2.7222 if you need any more help just keep asking
A prime number is a number that can only be divided for 1 and itself.
The right answer is B, 1053 is NOT prime. It can be divided for 1, 3, 9, 13, 27, 39, 81, 117, 351, 1053.
You can read this max y-value directly from the graph. It's 4. The vertex of this graph is at (2,4).