Fuel economy 2007.
Here are advertised horsepower ratings and expected gas mileage for several 2007 vehicles. (https://www.kbb.com/KBB/ReviewsAndRatings)
| Vehicle |
Horsepower |
Highway Gas Mileage (mpg) |
| Audi A4 |
200 |
32 |
| BMW 328 |
230 |
30 |
| Buick LaCrosse |
200 |
30 |
| Chevy Cobalt |
148 |
32 |
| Chevy TrailBlazer |
291 |
22 |
| Ford Expedition |
300 |
20 |
| GMC Yukon |
295 |
21 |
| Honda Civic |
140 |
40 |
| Honda Accord |
166 |
34 |
| Hyundai Elantra |
138 |
36 |
| Lexus IS 350 |
306 |
28 |
| Lincoln Navigator |
300 |
18 |
| Mazda Tribute |
212 |
25 |
| Toyota Camry |
158 |
34 |
| Volkswagen Beetle |
150 |
30 |
a) Make a scatterplot for these data.
b) Describe the direction, form, and strength of the plot.
c) Find the correlation between horsepower and miles per gallon.
d) Write a few sentences telling what the plot says about fuel economy.