1. 2.7 Curve Fitting

2. Correlation Positive Negative None
General upward trend of points (+ slope)
Negative
General downward trend of points (- slope)
None
No tend to be seen

3. Correlation Coefficient
r is the correlation Coefficient r is positive for positive correlation r is negative for negative correlation r is between 0 and 1 The closer to 1 r is the better the fit of the line to the data given *must have diagnostics on in order to get r value on calculator

4. Homework
Pg146(1,2,19-21,25)

5. 2.8 absolute value equations

6. Terms Conjunction (and) Disjunction (or)
Both conditions must be satisfied
Disjunction (or)
At least one condition must be satisfied

7. Absolute value inequalities
|x|= a means x = a or x = -a |x|< a means x < a and x > -a so –a < x < a |x|> a means x > a or x < -a

8. Solving abs equations Isolate the abs expression
Rewite as a compound inequality
Solve each piece for x and graph

9. Homework
Pg154(2,3,5,12,28-31,36)