posted by Anonymous .
Find an equation of the line that passes through two points.
(0,4) and (7,10)
the slope of the line is ∆y/∆x, so
m = 6/7
Now you have a point and a slope, so the line is
y-4 = 6/7 (x-0)
y-10 = 6/7(x-7)
and you can massage them to whatever form you like, and convince yourself that they are really the same equation.
After12 years I shall be 3 times as old as I was 4 years ago find my present age