Question

I do not understand how to transfer standard form into slope intercept form or point slope form or how to do it reverse.

Answer 1

Standard form: Ax + By = C
slope intercept form: y = mx + b
point slope form: y - y1 = m(x - x1)

lets use this equation as an example:
8x + 4y = 16    first subtract 8x
4y = -8x +16    then divide every number by 4
y = -2x + 4       this equation is now in slope intercept form