On the problem you have given, the y ingercept shows the amount of time in hours it takes for the number of customers, so it would cross at 5 and represent 0 customers
A^2 + b^2 = c^2 a=4 b= 6
4^2 + 6^2 =52
square root that:
c=2 square root 13 exactly or 7.2 approximately <span />
Its D. x = 2, y = -8
6*2 + (-8) = 12 - 8 = 4
The answer should be 4, 4 can go into all of these numbers