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Graphs of Inequalities in One Variable

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Health Charts

Credit: Laura Guerin
Source: CK-12 Foundation
License: CC BY-NC 3.0

Ever seen charts like the one above? It shows what category you’d fall in (underweight, normal, overweight, etc.) by comparing your weight to your height. These charts, along with many such health charts, are nothing but inequality graphs!

Calorie, Carbs, Cardio

For a given height, the above chart tells you what the ranges of weights are for different weight-wise classifications. You can see that a 4’7” adult weighing x lbs would be classified as being:

  • underweight, if x \le 88
  • normal weight, if 88 < x \le 110
  • overweight, if 110 < x \le 132

Credit: InvictaHOG
Source: http://commons.wikimedia.org/wiki/File:Body_mass_index_chart.svg
License: CC BY-NC 3.0

Are you familiar with the measurement known as body mass index (BMI)? Based on your weight and height, BMI is a measure of your body fat. It can serve as an indicator of how healthy you are. The height vs. weight chart above displays the corresponding BMI for each health range.

Read more about BMI here: 
http://www.cdc.gov/healthyweight/assessing/bmi/childrens_bmi/about_childrens_bmi.html

Explore More

Check out the links below to read about and view some charts on heart-rate zones vs. age, calorie requirements vs. weight, and cardio training.

http://www.examiner.com/article/fitness-tip-cardio-training

http://www.chartsgraphsdiagrams.com/HealthCharts/calorie-requirement.html

http://www.precisionnutrition.com/all-about-cardio

Image Attributions

  1. [1]^ Credit: Laura Guerin; Source: CK-12 Foundation; License: CC BY-NC 3.0
  2. [2]^ Credit: InvictaHOG; Source: http://commons.wikimedia.org/wiki/File:Body_mass_index_chart.svg; License: CC BY-NC 3.0

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