Answer:
The IQR is given by:

If we want to find any possible outliers we can use the following formulas for the limits:


And if we find the lower limt we got:


So then the left boundary for this case would be 3 days
Step-by-step explanation:
For this case we have the following 5 number summary from the data of 144 values:
Minimum: 9 days
Q1: 18 days
Median: 21 days
Q3: 28 days
Maximum: 56 days
The IQR is given by:

If we want to find any possible outliers we can use the following formulas for the limits:


And if we find the lower limt we got:


So then the left boundary for this case would be 3 days
The answer to your question is option b
Answer:
7 has been to Australia
9 has not been to the united states
10 has not been to Australia
8 has been to the United States
Direct variation:
y - the distance, x - the time
The object falls 144 feet in 3 seconds.
The object falls y feet in 17 seconds.
In 17 seconds the object will fall 4624 feet.