A)
we will write the equation

B) x=10, we just replace the x and solve y

the number of cases of water ir 15
Slope: 4.5
Y= 4.5x + 5
Extra:
Y intercept would be (0,5)
<span>6-2x=6x-10x+4
6-2x=-4x+4
Add 4x to both sides: 6+2x=4
Subtract 6 from both sides" 2x = -2
divide 2 from both sides: x=-1</span>