8.SP.3 - Scatter Plots and Equations - Use the equation of a linear model to solve problems in the context of bivariate measurement data, interpreting the slope and intercept. For example, in a linear model for a biology experiment, interpret the slope of 1.5 cm/hr as meaning that an additional hour of sunlight each day is associated with an additional 1.5 cm in mature plant height.
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This video does a good job showing you everything about scatter plots. It has you put the coordinates onto the graph, draw the line of best fit and then has you come up with the equations. This is will worth the time to see it all put into action.
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