WAEC Mathematics 2025 Paper

Concept:The minimum value of $y$ is the lowest point reached by the curve on the graph.Explanation:The graph is a parabola that opens upward.For such a curve, the minimum value occurs at the vertex, where the curve turns.At this turning point, the curve has its smallest $y$-coordinate.Reading from the $y$-axis, the vertex is at $y = -7$.No part of the graph goes below this level.Therefore, the minimum value of $y$ is $-7$.Answer:A. $-7$