JAMB Mathematics 2016 Paper

Concept:The diagram represents an inequality on a number line or graph, and the required region is the set of $x$ values indicated by the shaded part.Explanation:The shaded region starts at $x = -1$ and ends at $x = 4$.Both $x = -1$ and $x = 4$ are included because the endpoints are shaded or closed.Therefore, the values of $x$ lie between $-1$ and $4$, inclusive.This condition is written as $-1 \le x \le 4$.Answer:$\boxed{-1 \le x \le 4}$This is option C.