Answer: B) Sally uses 2 cups of sugar to make 4 dozen cookies. She needs to know how many cups to use if she wants to make 6 dozen cookies.
Step-by-step explanation:
Direct proportion refers to two or more quantities either increase or decrease together.
Let's check all the given options.
A) When time to do a job decreases then the number of workers increases or vice-versa.
It means it represents inverse proportion.
So this situation could not be modeled using a DIRECT proportion .
B) The quantity of cookies is directly related to quantity of sugar.
So to make 6 dozen cookies rather than 4 dozen , the amount of sugar require would increase .
It means this situation could be modeled using a DIRECT proportion .
C) Time is inversely related to the number of persons require to do a job.
So this situation could not be modeled using a DIRECT proportion .
D) Speed is inversely related to time when distance remains constant.
So when average of 60 mph increases to an average of 70 mph , the time taken to drove to New Orleans from Birmingham decreases.
Hence, the situation could be modeled using a DIRECT proportion is :
B) Sally uses 2 cups of sugar to make 4 dozen cookies. She needs to know how many cups to use if she wants to make 6 dozen cookies.
