In order to answer this question, FIRST you need to write the equation ins slope intercept form.
Slope intercept is y = mx + b
the "m" is the slope
the "b" is the y interccept
So, let's put this in slope intercept form, by keeping y on one side by itself. We must move the 12 to the opposite side of the equation first, then I can rewrite the equation with the y on the left.
10x = y+12
10x - 12 = y + 12 - 12 (I am subtracting 12 from BOTH sides)
10x -12=y (the 12 cancels out so I have only y left)
y=10x-12 (remember the equation is interchangeable. If 3 + 2 = 5, then 5 = 3 +2. I can do the same with slope intercept form)
So, now that the equation is in slope intercept form, I can see that 10 is where the "m" goes, so
the slope is 10. I can see that -12 is where the "b" goes, so
the y intercept is -12.