Posted by jojo on Monday, October 26, 2009 at 4:47pm.
Please help me solve this problem... thanks!
1.Find the equation of the line that cntains the pont (5, 1) and has slope 1/2
2.find the equation of the line that passes through the points (2,1) and (1,5)

math  Reiny, Monday, October 26, 2009 at 4:56pm
Easiest way, since you don't specify which form you want your equation in.
(based on the fact that for Ax + By = C 0, the slope is A/B)
1. Slope = 1/2
so the equation is x + 2y = C
plug in point, 5  2 = C
C = 3
so ..... x + 2y = 3
from there you can change it to any form they ask for.
try the second one the same way.