2-5 using linear models
Post on 02-Jan-2016
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QUESTION #2
Correlation:
Strong Negative Correlati
on
Weak Negative
Correlation
No Correlatio
n
Weak Positive
Correlation
Strong Positive
Correlation
QUESTION #3
Choose two points from your table.
Find the slope of these two points
Write the equation in point-slope form using one of your two points.
Transform your equation into slope-intercept form.
The trend line that shows the relationship between two sets of data most accurately is called the line of best fit.
The graphing calculator gives you the correlation coefficient r, which tells you how closely the equation models the data.
SCATTER PLOTS AND EQUATIONS OF LINES
0-1 1
QUESTION #5
If you guessed that a person’s age was 33, what would the exact age be based on the line of best fit?
Input x=33 into your equation for the line of best fit
QUESTION #6
If a person’s estimated age was 87, what would the exact age be based on the line of best fit?
Input x=87 into your equation for the line of best fit
QUESTION #7
If a person’s actual age was 54, what would have been the estimated age based upon the line of best fit?
This time, y=87. Solve for x.
QUESTION #8
What is your age? Based upon your line of best fit, what would have been your estimated age?
This time, y=(your age). Solve for x.
QUESTION #10
Based on your scatterplot and your correlation coefficient, were you a good guesser or a bad guesser?
Does your scatterplot have a strong correlation?Is your correlation coefficient, r, close to 1 or -1?
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