D: 0.989
C: 44.25 ft
C: I can be very confident; it will be close, but it probably wont be exact
For questions 3-4, use your calculator to create a scatter plot and line of best fit for the data:
Average height of a species of tree after a certain number of years
years: 1,2,3,4,5,6,7,8
height: 2.1,3.2,6.8,7.3,11.2,12.6,13.4,15.9
3. What is the correlation coefficient for the set? Round your answer to the nearest thousanth.
4. About how tall would you expect one of these trees to be after 22 years?
5. You use a line of best fit to make a prediction about an unknown value. The correlation coefficient for the set is -0.993. How confident can you be that your prediction will be reasonably close to the actual value?
1 answer
1 answer