How do you reverse division? You multiply. So, the answer is multiplying by 28.
The answer to this question is:
y = -2x - 1
I think the answer would be 30 minutes
To graph y=-7x-3, you're going to make your first coordinate at (-3,0) b/c that is your y-intercept and you will continuously move down 7 and right one.
To graph y=4, you will simply make a horizontal line through the to coordinate (4,0).
Hope that helped.