A four-quadrant coordinate grid numbered from −10 to 10 on both axes, with arrows at every end and x and y at the arrow tips. The line y = 2x + 1 is drawn across it in black, crossing the y-axis at 1 and rising 2 for every 1 across, with an arrowhead where it leaves the grid at each end. The equation isn’t written on the figure, so students can find it from the graph.