Drag point A or B; they snap to whole numbers from −10 to 10. Keyboard: focus the graph, press A or B to pick a point, then use the arrow keys. Or type coordinates in the boxes.
Your job
Tap a graph, then tap the equation that matches it (or the other way round). Each graph has a 1-unit grid. Every card is a button, so Tab and Enter work too.
Fictional people and practice numbers to learn the math.
Wrong picks are fine here. Each one tells you why.