GRE Sample Test 4 Quantitative Reasoning 1

To find how many categories had energy use greater than 150 million kilowatt- hours, you have to find out how many total kilowatt-hours were used in that year using the line graph. You see that 600 million kilowatt-hours were used in 1995. What is the relationship of 150 million kilowatt hours to 600 million kilowatt-hours? It’s 25% of 600 million kilowatt-hours, so you’re looking for categories with more than 25% of the energy use for 1995. How many categories exceeded 25%? Just two, government and industrial. So your answer is (C).