[填空题]
A small town is planning the construction of a new road. The new roadro0mj o7mzx)o ;h,e5p wijz z km,jj)1sn*p(6pell pass through the point A(0,5) and will be perpendicular to the road connecting the points B(3,0) and C(6,6). This infjs6zpnm) , *(ejkzjp1ormation 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=
