The following table gives the weight (in hundreds of pounds) and the fuel mileage of several cars.
|
Weight (hundreds of pounds)
|
27
|
44
|
31
|
48
|
23
|
40
|
34
|
52
|
15
|
|
Fuel Mileage (mpg)
|
30
|
19
|
24
|
13
|
29
|
17
|
21
|
14
|
35
|
1. Which is the explanatory variable?
2. Draw a scatterplot on your calculator and comment on the form, direction, and strength of the data.
3. What does the direction of the relationship tell you?
4. Calculate the equation of the regression line. Write the equation below using the correct notation.
5. Interpret the slope in the context of the problem, using the correct units.
6. What would you predict as the fuel mileage for a car that weighs 3,000 lbs.?