The case of 12 bottles of shampoo holds a total of 126 ounces. If each bottle of shampoo contains the same amount, which represents the total volume of shampoo in ounces, y, of any number of bottles, x?
12 y = 126
y = (StartFraction 12 Over 126 EndFraction) x

Volume of Shampoo
On a coordinate plane, the x-axis is labeled number of bottles and the y-axis is labeled total volume (in ounces). A line goes through points (1, 10) and (4, 42).

Volume of Shampoo
On a coordinate plane, the x-axis is labeled number of bottles and the y-axis is labeled total volume (in ounces). A line goes through points (1, 10) and (40, 3.8).