A new railroad company is building a rail line just north of town.
The rail line passes through points A(0,8) and B. The railroad is perpendicular to a highway to the east of town. The highway passes through points C(3,0) and D
(7,9).
9) m = 9-0
1-3
a. Find the gradient of the road through C and D.
2.25
b. State the slope of the rail line that passes through A and B.
c. Find the equation of the rail line.
d. Find the coordinate of point B.