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WARM UP MAR. 2 ND REVIEW Find the slope of the following ordered pairs. Round to 2 decimal places. 1. (1995, 22.5) and (2011, 47.25) 2. (13, 175) and (52, 700) Write the equation of the line given two points. 3. (2, 1070) and (9, 4290)

Warm Up Mar . 2 nd

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REVIEW Find the slope of the following ordered pairs. Round to 2 decimal places. (1995, 22.5) and (2011, 47.25) (13, 175) and (52, 700) Write the equation of the line given two points. (2, 1070) and (9, 4290). Warm Up Mar . 2 nd. - PowerPoint PPT Presentation

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Page 1: Warm Up      Mar .  2 nd

WARM UP MAR. 2ND REVIEW

Find the slope of the following ordered pairs. Round to 2 decimal places.

1. (1995, 22.5) and (2011, 47.25)

2. (13, 175) and (52, 700)

Write the equation of the line given two points.3. (2, 1070) and (9, 4290)

Page 2: Warm Up      Mar .  2 nd

5.7 SCATTER PLOTS AND LINES OF BEST FIT•Definition: A scatter plot is a graph of ordered pairs.• They may not form a straight line, but we can

look for a pattern (correlation).•3 Types of Correlation:

Page 3: Warm Up      Mar .  2 nd

ANALYZE SCATTER PLOTS•Determine whether each graph shows a positive, negative or no correlation. If there is a positive or negative correlation, describe its meaning in the situation.1. Correlation:

__________________

Meaning: ___________________________________________________________________

Page 4: Warm Up      Mar .  2 nd

ANALYZE SCATTER PLOTS (CONT.)2. 3.

Page 5: Warm Up      Mar .  2 nd

LINE OF BEST FIT•Definition: A line of best fit is a line that describes the trend of the data.• It tries to split the points down the middle. Also

referred to as the “best-fit line”.•Examples: Write the equation for the line of best fit.1.

Page 6: Warm Up      Mar .  2 nd

LINE OF BEST FIT (CONT.)Draw a scatter plot and determine what relationship exists for the data.

Write the slope-interceptform of an equation forthe line of best fit.

Page 7: Warm Up      Mar .  2 nd

YOU TRY!Use the table that shows the average body temperature in Celsius of 9 insects at a given air temperature.

Write the slope-intercept form of an equation for the line of best fit.

Page 8: Warm Up      Mar .  2 nd

USING THE LINE OF BEST FIT & PREDICTIONS

Examples:1. Using the equation of the line of fit for the Bald

Eagle data, estimate the number of bald eagle pairs in 1998.

Page 9: Warm Up      Mar .  2 nd

EXAMPLES (CONT.)2. Using the equation of the line of fit for the

temperature data, predict the air temperature if an insect has a body temperature of 40 degrees.

Page 10: Warm Up      Mar .  2 nd

YOU TRY!The table gives the number of carbon atoms and the boiling points for several hydrocarbons.1. Write the slope-interceptform of the line of best fit.

2. Predict the boiling point forMethane (CH4) which has 1carbon atom.

3. The boiling point of heptane is 98.4 degrees. Predict the number of carbon atoms in heptane.

Page 11: Warm Up      Mar .  2 nd

HOMEWORK5.7 Worksheet