d. Plot just the data from 1982 – 1996 and create a scatterplot on your calculator. What model do you believe will best fit this data?
17
HINT: Click the circle to the left of y_3 below to show the data from 1982 – 1996.
18
19
e. Use your calculator to find a regression line for the data from 1982 – 1996.
20
HINT: See the eTools for problems 6-105 and 6-106 for regression formulas. Be sure to use x_3 and y_3 for your variables.
21
22
f. Comment on the residuals plot.
23
g. With this new linear model, can you make a better prediction than you did in part (a) for the amount of oil produced in 1996?
24
h. Since you used two different models for the data, you will need to make a piecewise graph that shows both models. On your paper, make a scatterplot of the oil production data with the piecewise model: create a scatterplot with all the oil production data from 1905 to 1996, with both the exponential best-fit model and the linear best-fit model shown. What is the domain of each model?
25
26
powered by
powered by
New Blank Graph
Examples