1. Objective: I can write linear equations that model real world data.
2-5
Using Linear Models
Objective:
I can write linear equations that model real world data.

2. Scatter plots & Correlation
A graph that relates two sets of data.
Correlation:
Strength of a relationship
Strong Negative Correlation
Weak Negative Correlation
Weak
Positive Correlation
Strong Positive
Correlation
No Correlation

3. Trend Line:
A line that approximates the relationship between variables.
How To:
Plot data
Draw line
Follows direction of data
Divide points equally
Pick two points on the line and find the equation for the line
Line of best fit:
Trend line that most accurately models the data.
Do Problem 2 from text along with problem 3 using the same data.

4. The Wave Number of People Time (seconds) 5 9 14 19 28 Calculator:
Number of students
Time (seconds)
The Wave
Number of People
Time (seconds) 5 9 14 19 28
Equation: y =
Calculator:
Input data in to list 1 & 2: [STAT], [1: Edit]
[STAT]; [►]; [4: LinReg (ax + b)]; [enter]; [enter]
Domain:
1 person to 35
Range:
0 seconds to 20

5. Median Home Prices in California
x = year since 1940
y = Median Price
Year
Median Price ($)
1940
47,100
1950
63,100
1960
76,900
1970
89,900
1980
119,200
1990
207,400
2000
170,800
Years since 1940
p. 96:8, 11, 24-29
Median Price
Trend Line: y=2000x+40000
Linear Regression: [stat],[>] (stat, calc)
Turn on diagnostic for correlation coefficient
year since 1940