Let me get this straight.. there are three equations:

**slope - y intercept form: **
y = mx + b

**standard form**:

ac + by + c = 0

**point- slope form:**
y - y1 = m(x + x1)

Now: how do you convert from one form to another form? And I'm not sure I quite understand what each equation

**represents**. For example, in standard form, what does

**C** represent? In slope-y intercept form, what does

**x** represent? This is so confusing.

And the thing is, I know the information and the principles, but I can't apply it in actual math questions. Does anybody have any hints on how to learn when to use one equation rather than another, or how to solve problems with these equations?

Thanks