## Thinking Mathematically (6th Edition)

Published by Pearson

# Chapter 1 - Problem Solving and Critical Thinking - 1.2 Estimation, Graphs, and Mathematical Models - Exercise Set 1.2 - Page 27: 44

#### Answer

For approximately $3,300,000$ high school teenagers, social pressures and fitting in is the most important problem.

#### Work Step by Step

The graph shows data for $16,503,611$ students in the United States. Out of those students, the graph shows that for $22\%$, social pressures and fitting in is the most important problem. $22\%$ is approximately $20\%$, which is $\frac{20}{100}=\frac{1}{5}$; therefore, without using a calculator, we can estimate: $16,500,000*\frac{1}{5}\approx3,300,000$ For about 3,300,000 high school teenagers, social pressures and fitting in is the most important problem.

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