how do you solve point slope intercept form?

I personally am not very good at explaining things, so here are two websites that might help :)

 

Purplemath

http://www.purplemath.com/modules/strtlneq2.htm

 

Khan Academy

https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/point-slope/v/idea-behind-point-slope-form