Answer:
m=3, y-int=-1
Explanation:
y-3x=-1, reorganize this into y=mx+b by moving -3x to the right side.
y=3x-1, remember that in y=mx+b, m=slope, which is 3 as you can see easily.
The y-intercept is when x=0. So plug this into y=3(0)-1, which is just y=-1.