Question 135957
{{{m = (-3-5)/(7-2) = -(8/5)}}} So far, so good. 
{{{5 = -(8/highlight(7)) (2) + b}}} Here's a problem, the number in the box should be 5.
Remember, you can always take your final equation and use your original points to verify. 
You get your equation {{{y=mx+b}}}.
Plug in the x, it should give you the same y as you originally had. 
If it does, you're correct.
If it doesn't, something's wrong. 
Re-calculate and post another question if you're unsure.