The stacked line graph to the left shows the percentage of visits to

Official Explanation

Notice that the graph uses cumulative percentages. That means that on Day 1, the national site got about 30% of visits, not 60%. Likewise, the sports page received 40% of visits that day, not 60% or 100%. To find any value that isn't international, you need to subtract the percent value at the top of that section of the chart from the value at its lower limit (to find the percentage for the international page, which is the bottom section on the graph, you can simply read the value at the top of that section).

1. The news page whose percentage of hits was the most consistent over the 10 days measured was _____

The national page received about 30% of the total hits every day during the 10 days. That's much more consistent than the other two pages. The sports page varied by about 20%, and the international varied by close to 15%. Therefore, the national page had the most consistent percentage of visits.

You can also tell the national page was the most consistent by looking at the borders between the stacked line graphs. The two lines that form the upper and lower borders of the national section of the graph are almost identical in shape. That means that the middle value changed very little.

Answer: A

2. If the total number of visits to LNN doubled from Day 6 to Day 9, then the number of visits to the sports page ______ over the same period.

Picking Numbers can help us solve this problem easily. Let's say that on Day 6, there were 10 visits total to LNN's pages. That means that 5 of them would have been to the sports page. That also means that on Day 9, there would have been 20 total visits to LNN, 30% of which were to the sports page. Then 30% of 20 is 6, so the number of visits to the sports page increased.

Using the percents, Day 6 is 50% and Day 9 is 30%. If the value doubled, 30% of twice the 50% value will be greater, since 30% is more than half of 50%.

Answer: A