Answer:
16 dollars
Explanation:
The price includes the price of an empty bag B and the price of popcorn that is proportional to x (the number of ounces). Let each popcorn cost A$. Then the price of bag y = Ax + B
Given x = 10, y = 6, so 6 = 10A + B (1)
Given x = 20, y = 8, so 8 = 20x + B (2)
(2) - (1): 2 = 10A, so A = 2/10 = 0.2
Sub it into (1), 6 = 10*0.2 + B = 2 + B, so B = 6 - 2 = 4
We got y = 0.2x + 4
Check: x = 35, y = 0.2*35 + 4 = 11 (right)
x = 48, y = 0.2*48 + 4 = 13.6 (right)
Now find y when x = 60
y = 0.2*60 + 4 = 16 dollars