Chapter 24 Red Pen and Pencil

Starting last week, evening tutoring sessions have become a regular program.

Every day after I come home and finish eating, she washes the dishes, and the two of us sit at the desk for two or three hours at a time. The desk isn’t big; it can barely fit an A3 exam paper, a “53” textbook, and a draft notebook. She sits on the left, and I sit on the right, our chairs squeezed together, and it’s common for our elbows to bump into each other.

Today we’re working on the graph of a quadratic function.

”How do I find…