The graph shows the total sales for Company X and its traffic (in mill

Question

https://gmatclub.com/forum/download/file.php?mode=view&id=53222 The graph shows the total sales for Company X and its traffic (in millions of unique visitors) for each of the years 2000-2010. From each drop-down menu, select the option that creates the most accurate statement based on the information provided. 1. The percent decrease in the total sales from 2007-09 was approximately GRAPH_1_PLACEHOLDER %. 2. The amount of dollar sales per unique visitor increased by approximately GRAPH_2_PLACEHOLDER from 2002 to 2007. 122.jpg

Apt0810 · Answer

1)C,The percentage decrease from total sales is (18-9)/(18)*100
2)2002->6/12.5=0.48
2007->18/20= 0.9 increase is approximately of 0.5

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arushi118 · Answer

Does this question not require too exact of an approximation?

I estimated the traffic to be 12M in 2002 and not 12.5M -- this resulted me getting a 0.8 as an answer for the second dropdown.

Bunuel · Answer

How did you get 0.8?

Adit_ · Answer

Even if you take the ratio as 5/15 = 1/3 or 33.33% and the other ratio as 19/20 = 95%
The difference is 62% around and it is still closer to 0.5 than 0.8.

arushi118 · Answer

I took the ratio for 2002 as 6/12 and the ratio for 2007 as 18/20.
So the difference came out to be 4/10

And the percentage change came out to be: (4/10)/(5/10) = 0.8

Bunuel · Answer

Notice that we are not asked about the percentage change:

The  amount  of dollar sales per unique visitor increased by approximately...

arushi118 · Answer

Got my mistake. Thank You so much!

egmat · Answer

This question has two parts, each requiring you to read specific values from the graph and perform a calculation. Let me walk through both.

Dropdown 1: Percent decrease in sales from 2007 to 2009

Look at the blue bars (Sales, left y-axis):
-  2007  sales: approximately  $18M  (the tallest bar on the graph)
-  2009  sales: approximately  $9M

Percent decrease = (Old - New) / Old x 100 
= ( 18  -  9 ) /  18  x  100 
=  9  /  18  x  100 
=  50%

Answer: 50

Dropdown 2: Increase in dollar sales per unique visitor from 2002 to 2007

Here you need values from BOTH the bars and the line. Read Sales from the blue bars (left axis) and Traffic from the gold line (right axis).

For 2002: 
- Sales ≈  $6M 
- Traffic ≈  12M  visitors
- Sales per visitor =  $6M  /  12M  =  $0.50

For 2007: 
- Sales ≈  $18M 
- Traffic ≈  18M  visitors
- Sales per visitor =  $18M  /  18M  =  $1.00

Increase =  $1.00  -  $0.50  =  $0.50

Answer: 0.5

Key Insight:   The  key trap  in Dropdown  2  is that you must read TWO different scales carefully — the left axis for the bars and the right axis for the line — and then compute a ratio before finding the difference. Many students either misread the traffic axis or forget to calculate the per-visitor rate for each year separately before subtracting.

The graph shows the total sales for Company X and its traffic (in mill

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