Equation of straight line!
Hey, i need some help with this question!
9(i) Find the gradient of the line l1 which has the equation 4x-3y+5=0.
I think its 4 by doing this:
y=mx+c where m is the gradient? Is that right?
(ii) Find an equation of the line l2 which passes through the point (1,2) and which is perpendicular to the line l1 giving your answer in the form ax+by+c=0
If someone could give a detailed solution for me, but as simple as possible i would be most grateful!
Thanks very much! :D