1.16 Income and education in US counties. The scatterplot below shows the relationship between per capita income (in thousands of dollars) and percent of population with a bachelor's degree in 3,143 counties in the US in 2010. (a) What are the explanatory and response 60 variables? (b) Describe the relationship between the two variables. Make sure to discuss un- 40 Per capita income (in $1,000) usual observations, if any. (c) Can we conclude that having a bache- 20 lor's degree increases one's income? 10 30 50 70 Percent with Bachelor's degree