January 23, 2013

January 23, 2013

A scatter plot is a graph with points plotted to show a relationship between two sets of data.

January 23, 2013

Correlation describes the type of relationship between two data sets.

A line of best fit is a straight line that comes closest to the points on a scatter plot.

January 23, 2013

January 23, 2013

January 23, 2013

1. The table shows the study times and test scores for a number of students. Draw a scatter plot of the data. Put study time on the horizontal axis and test score on the vertical axis.

January 23, 2013

1. The table shows the study times and test scores for a number of students. Draw a scatter plot of the data. Put study time on the horizontal axis and test score on the vertical axis.

January 23, 2013

2. The weights of ten Holstein calves, of different ages, are given in the table. Sketch a scatter plot of the data. Put age on the horizontal axis. Then describe any pattern that you see in the scatter plot.

January 23, 2013

2. The weights of ten Holstein calves, of different ages, are given in the table. Sketch a scatter plot of the data. Put age on the horizontal axis. Then describe any pattern that you see in the scatter plot.

January 23, 2013

3. The table below shows the number of wins and the number of goals scored for the Eastern Conference in the National Hockey League in 1999. Use the data set to answer the questions.

a. Construct a scatter plot that compares wins with the number of goals scored. Put the number of goals on the horizontal axis.b. Do the number of goals scored seem to affect the number of wins? Can this be expected? Explain your thinking.

January 23, 2013

4. Which line best fits the data graphed below?

B

January 23, 2013

Tell whether the scatter plot has a straight-line pattern, a curved pattern, or not pattern.

curved pattern straight-line pattern

January 23, 2013

9. In the table, x represents the number of years a company has been in business and y represents the number of employees that the company has. Construct a scatter plot with a fitted line for this data. What can you conclude about the data, based on the scatter plot?

January 23, 2013

9. In the table, x represents the number of years a company has been in business and y represents the number of employees that the company has. Construct a scatter plot with a fitted line for this data. What can you conclude about the data, based on the scatter plot?

January 23, 2013

7. The graph show the price of a gallon of unleaded gasoline at randomly selected stations located various distances from town.

Use the fitted line to determine the cost of a gallon of gasoline 90 miles from town.

January 23, 2013

8. The table shows the relationship between the time a student spends studying each week and the student's percent improvement on test grades. On graph paper, make a scatter plot of percent improvement versus study hours. Put study hours on the horizontal axis. Then draw a fitted line. Using the fitted line, estimate how many study hours would be expected if the percent gain was 13%.