Linear Functions + Fractions = A class that has no clue xD

Yo! First student post, haah...still don't know why I raised up my hand . _.; ANYWAYS...
Today we got a review about fractions and linear functions, which almost all of us forgot how to do =.=; For the linear functions, what you have to remember are the formulas which are:

Slope Intercept

and

Slope Formula

For the sheet he gave us, you wanna use slope intercept when we had to sketch the graphs, or when we had to write in slope intercept form.
Ex. "Write the slope-intercept for of the equation of each line" which were questions 9 - 12
and questions 11 - 12 when we were one point and a slope.

On the other hand, we would use our slope formula when we would have to find the slope of the line on the graphs (Q. 5 -6) or when we had to write slope intercept without being given slope
(Q. 13 - 14).

I hope that at helped a bit ^^; if not at all haah...xD Hopefully Mr.Piatek can shed some light on this more, and give me some bonus marks :D