On a planar field, you travelled 3 units East from a point O. Next you travelled 4 units South to arrive at point P. Then you travelled from P in the North-East...

You should _________ when to say _________.

Two straight lines pass through the origin (x0, y0) = (0,0). One of them passes through the point (x1, y1) = (1,3) and the other passes through the point (x2,...