# 5-2D Scatter Plots and Trend Lines Warm-up (IN) Learning Objective: to use trend lines and linear functions to interpret data that do not fall neatly on.

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5-2D Scatter Plots and Trend Lines Warm-up (IN) Learning Objective: to use trend lines and linear functions to interpret data that do not fall neatly on a line. 1. Find the slope and y-intercept of the line m = -4 b = 5 m = 2 y = -2x-2 2. Find the slope of the line through the 2 points (-5,2) and (-6,0) 3. Write the equation of the line shown in the graph. 4. Write the equation of the line that goes through the points (-3,-9) and (0, -9). y = -9

Notes Learning Objective: to use trend lines and linear functions to interpret data that do not fall neatly on a line. Ex 1 – In the table, x represents the diameter of a tree trunk and y represents the age of the tree in years. x41040253520 y15 101520 a. Create a scatter plot of the data b. Use spaghetti to find and draw a trend line. c. Pick 2 points on line and find the equation. d. Use the equation to predict the age of a tree with a 30 inch diameter trunk.

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HW – pg. 355 #8-10 Out – what does a trend line or line of best fit enable you to do? Give an example… Summary – today I learned… POW!!

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