1. STATISTICS: USING SCATTER PLOTS CHAPTER 2 LESSON 5

2. VOCABULARY Bivariate Data- Data with two variables. Scatter Plot- A set of bivariate data graphed as ordered pairs in a coordinate plane. Positive Correlation- Positive slope on scatter plot Negative Correlation- Negative slope on scatter plot No Correlation- No slope on scatter plot Line of Fit- A line that closely approximates a set of data Prediction Equation- The equation of the line of fit

3. POSITIVE CORRELATION

4. NEGATIVE CORRELATION

5. NO CORRELATION

6. PREDICTION EQUATION Also known as a ‘line of fit’ Graph points on scatterplot Draw a linear line that follows correlation of points Make sure it goes through two points to make following steps easier Find equation of the line using the two points on the line.

7. HOW TO READ A TABLE Horizontal Table- top values are x values, bottom values are y values Vertical Table- left values are x values, right values are y values x y xy

8. EXAMPLE Year199419961998200020022004 Price ($1000)130.0140.0152.5169.0187.6219.6 A)Draw a Scatterplot B)Find Prediction Equation C)Predict value for 2014 D)How accurate is prediction?

9. EXAMPLE Year199419961998200020022004 Price ($1000)154.5166.4181.9207.0228.7273.5 A)Draw a Scatterplot B)Find Prediction Equation C)Predict value for 2014 D)How accurate is prediction?

11. HOMEWORK Worksheet 2-5