Posted by Julie on Saturday, February 19, 2011 at 5:18pm.
Find the equation of the line that passes through the points ( 8,  15 )and(2,5). write the equation in y=mx = b form.

algebra  Reiny, Saturday, February 19, 2011 at 6:43pm
slope = (5+15)/(28) = 2
now you have m=2
Use that and one of the points to sub into the equation
y = mx + b
find b and you are done.