Explanation:
10)
Commission = $750
11) Constant of proportionality (k)
k = (Cups of blackberry) / (cups of juice)
3 cups of blackberry for each cup of juice
On the table:
12 cups of black berry required: 12/3 = 4 cups of juice
8 cups of juice required: (8)(3) = 24 cups of blackberries
12) The equation
assign: cups of blackberry: b, cups of juice: j
Hope this helps