What are the domain and range of f(x) = 4x – 8? domain: {x | x is a real number}; range: {y | y > –8} domain: {x | x is a real number}; range: {y | y > 8} domain: {x | x > 4}; range: {y | y > –8} domain: {x | x > –4}; range: {y | y > 8}

The stem-and-leaf plot shows the heights in centimeters of teddy bear sunflowers grown in two different types of soil. soil a soil b 5 9 5 2 1 1 6 3 9 5 1 0 7 0 2 3 6 7 8 2 1 8 3 0 9 key: 9|6 means 69 key: 5|8 means 58 calculate the mean of each data set. calculate the mean absolute deviation (mad) of each data set. which set is more variable? how do you know?