Paper 2 · Co-ordinate Geometry
In the diagram AC is 10 units and BA is parallel to CD. BA is the line y = 3x + 4. (a) Write down (i) the value of y at C, (ii) the equation of the line CD which is parallel to y = 3x + 4. (b) Find the coordinates of the point D where the line in part (a)(ii) crosses the x-axis.
Model answer
(a)(i) -6; (a)(ii) y = 3x - 6; (b) D(2; 0)
Also accepted: -6; y = 3x - 6; (2, 0), -6; y=3x-6; (2;0), y = -6; y = 3x - 6; (2,0), -6; y = 3x - 6; D(2; 0)
ZIMSEC Mathematics 4008/2, June 2011, Q10, via the Topical Collection