Find the equation of the line that passes through the points and .
Solution: Given two point (x1,y1)=(-4,1) (x2,y2)=(5,7)
y-y1/x-x1 = y2-y1/x2-x1 y-1/x+4/6/9 y-1/x+4 = 2/3
The equation of the line =2x-3y+11=0