Posted by Jean on Saturday, December 11, 2010 at 9:49am.
Express by an algebraic equation the statement that the line joining P(x,y)to the point (12,5) has an inclination of arctan 1/3.
please help...thanks

Analytic Geometry  Reiny, Saturday, December 11, 2010 at 10:23am
Did you know that the slope of a line is the tangent of the angle that the line makes with the xaxis?
So they are telling us that the slope of the line is 1/3
so (y+5)/(x12) = 1/3
crossmultiply and simplify if you want the actual equation of the line.