Straight line graphs GCSE questions1. Circle the coordinate that lies on the line 6x+12y=06x+12y=06x+12y=0 (12,6) (18,0) (2,0) (2,-1) (-4,-2) (1 mark) Show answer 2. (a) Two straight lines intersect at the point P. P. P. Calculate the coordinate of P. P. P....