The slope is undefined because you need a y intercept as well.
Let's put it this way.
It's a ratio of 6:72 and we need to change it in a way to find number of rooms cleaned in 9 days.
Divide 6 & 72 both by 2
Ratio is now 3:36
Multiply 3 & 36 both by 3
Ratio is now 9:108
The number of rooms in which Robin can clean in 9 days is 108 rooms.
2.7? im actually not 100%sure on this one
2. |2+(-4)| = 2 |2| + |(-4)| = 6
