Situations

• -abcdef X = year (in five-year increments from 1970), Y = Medicare costs (in $) (Note: the yearly increase in Medicare costs has gotten bigger and bigger over time.)
• -abcdef X = chest girth (cm), Y = shoulder girth (cm) for a sample of men
• -abcdef X = engine displacement (liters), Y = city miles per gallon for a sample of cars (Note: engine displacement is roughly a measure of engine size. Large engines use more gas.)
• -abcdef X = month (January = 1), Y = average temperature in Boston MA in 2010 (Note: Boston has cold winters and hot summers.)
• -abcdef X = month (January = 1), Y = rainfall (inches) in Napa, CA in 2010 (Note: Napa has rain in the winter months and months with little to no rainfall in summer.)
• -abcdef X = average temperature in Boston MA (°F), Y = average temperature in Boston MA (°C) each month in 2010

Scatterplots

1. Scatterplot 2
2. Scatterplot 1
3. Scatterplot 4
4. Scatterplot 3
5. Scatterplot 6
6. Scatterplot 5