[填空题]
A small town is planni2,-ar0 als xlx l6s 8giz2c,dh:.alp; r561auij jaoh ng the construction of a new road. The new road will pass thro 1la 5 ri;hjp.:auoaj6ugh the point A(0,5) and will be perpendicular to the road connecting the points B(3,0) and C(6,6). This information is shown in the following diagram.
1.Find the gradient of the line through points B and C. $m_{BC}$ =
2.Hence, state the gradient of the line through points A and D. $m_{AD}$ =
3.Find the equation of the line through A and D. Give your answer in the form y=mx+c. m = c =
4.Point D lies on the x-axis. Find the coordinates of point D. (a,b) a= b=
