Answer: By looking at the graph, we can see both plans cost the same when 50 texts are sent.
This can be determined by looking at the graph. The x-axis is the number of texts sent. The y-axis is the cost of the plans. The red line (Emilia) and the blue line (Hiroto) collide at the coordinates (50, 22.5). Remembering what the axis mean, it can be determined that both plans cost the same when 50 texts are sent.
(Hope this helps!)