Which of the following is a direct proportion?
A. y=7x
B. y=x+7
C. y=7x−7
D. y=7

Option 1 is correct

Step-by-step explanation:

Given that maximum is 48.  

Of the given four box plots only options 1 and 3 satisfy this. So we can ignore 2 and 4 as incorrect.

Comparing 1 and 2, let us find minimum. Minimum is both shown as 27.

I quartile, 32 is shown correctly in Option I.  But in Option III it is shown as 31.

Hence OPtion III is incorrect

The only option which shows minimum as 27, median 36, upper quartile 45 and lower quartile 32 is Option I.

Hence OPtion I is the only correct option