Answer:
Step-by-step explanation:
(7,-6) (13,2)
2--6. 8. 4
------= ------= ------ (2--6 turns to a +)
13-7. 6. 3
 4
Slope:------ 
 3
Points=(7,-6)
 4 
y--6=----(x-7) (y--6 turns to a +)
 3
 4. 28 
 y+6= ---- x - ----
 3. 3
 -6. -6
-------------------------
 4. 46
y=----- x - ------- 
 3. 3
 
        
             
        
        
        
Counter clockwise means it goes backwards so -90°
After the 90° counter clockwise rotation the coordinates are (4,-3)
 
        
        
        
Y=3negativeX+18. y=3(-x)+18. I hope I helped.
        
             
        
        
        
20 times 10=200 fluid ounces
128 fluid ounces per gallon
1 gallon is too little
2 gallons is to much
but  you can't buy 1 and 72/100 of a bottle so just buy 2
2 bottles