2010 AMC 8 Problem 3

Below is the professionally curated solution for Problem 3 of the 2010 AMC 8, from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 2010 AMC 8 solutions, or check the answer key.

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Concepts:data and graph interpretation percentage

Difficulty rating: 790

The graph shows the price of five gallons of gasoline during the first ten months of the year. By what percent is the highest price more than the lowest price?

$\ 50$

$\ 62$

$\ 70$

$\ 89$

$\ 100$

Solution:

The highest price is $17$ and the lowest price is $10.$ This means the percent is $(\dfrac{17}{10}-1)\cdot 100 = 70.$

Thus, the answer is C .

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