Question

How do you turn y=3-2x into slope-intercept form

Answer 1

It's already in slope intercept form.
y=mx+b where m=slope and b is your y-intercept, or where your line crosses the y axis.
If you were to move your numbers around so they match up with y=mx+b, it would be y=-2x+3. So your slope is -2 and your line intersects the y axis at y=3