Scatter Plots The accompanying table shows the number of applications for admissions that a college received for certain years. Create a scatter plot that models this data. Year # of Applications That was easy College Applications # of Applications Year

Scatter Plots on a Graphing Calculator Lets take another look at that chart. Year # of Applications Let x = 1 represent 1991, x = 3 represent 1993 and so on so that x = 10 represents Store the data Press STATENTER Enter x values in L1 and corresponding y values in L2. Set up the Scatter Plot Press 2ndSTAT PLOTENTER Display the Scatter Plot Press ZOOM9 Or press GRAPH That was easy

Comparing Correlation Coefficients and Trends in Scatter Plots As x increases, y increases. The closer r is to 1, the better a line fits the data and the stronger the linear relationship is. There is no significant linear relationship between x and y. The closer r is to 0, the weaker the linear relationship is. As x increases, y decreases. The closer r is to -1, the better a line fits the data and the stronger the linear relationship is. Positive Correlation Negative Correlation No Correlation

Another Scatter Plot Make a scatter plot using the given data and describe the relationship. Altitude and Temperature Altitude Temperature The data has a negative correlation.

Homework Page 341: 7 – 10 Draw scatter plots and describe the relationship