Detailed description
Cartesian plane. Line y = 2x + 1 drawn. Horizontal dotted line labelled '1' drawn joining points (0, 1) and (1, 1). Vertical dotted line labelled '2' drawn joining points (1, 1) and (1, 3).
The equation of a straight line
Cartesian plane. Line y = 2x + 1 drawn. Horizontal dotted line labelled '1' drawn joining points (0, 1) and (1, 1). Vertical dotted line labelled '2' drawn joining points (1, 1) and (1, 3).