It is difficult to determine a person's body fat percentage accurately without immersing him or her in water. Researchers hoping to find ways to make a good estimate immersed 20 male subjects, then measured their waists and recorded their weights shown in the table at the top of the next column.
a) Create a model to predict %Body Fat from Weight.
b) Do you think a linear model is appropriate? Explain.
c) Interpret the slope of your model.
d) Is your model likely to make reliable estimates? Explain.
e) What is the residual for a person who weighs 190 pounds and has 21 % body fat?

Waist Weight Body Waist Weight Body (in) (lb) Fat (%): (in.) (lb) Fat (%) 32 175 36 181 21 8 20015 33 159 39 196 22 40 192 31 33 188 10 40 240 20 36 175 22 32 168 44 246 38 33 160 10 41 215 27 34 5912 34 146 10 44 219 28 205 32 35 173 21 38 187 25 38 188 30