Which method of solving proportions is illustrated in the problem and solution below?
For the problem "Apples cost $2.50 for 2 pounds. How much will 9 pounds cost?" the solution process is:
Take the 2 pounds as a unit or "chunk."
Determine how much 8 pounds and 10 pounds would cost.
Determine how much the cost would be for halfway between 8 and 10 pounds.
A)using a multiples table
B)using a unit rate
C)using unitizing
D)using the cross-product algorithm

Question

Quizplus · Accepted Answer

This problem uses unitizing, where the 2 pounds is treated as a unit or "chunk" and the cost of other amounts (in this case, 8 pounds and 10 pounds) is determined based on multiples or proportional relationships to that unit.

Which Method of Solving Proportions Is Illustrated in the Problem