Fit a linear function to data when a scatter plot suggests a linear association.
Estimate the slope of a line of fit from two points on the line
Problem
A line of fit passes through \((0,~4)\), \((5,~14)\). Estimate its slope.
Big Picture
What this problem is really about
Slope is a rate built from two points on the same fitted line, not from the nearest data dots or the line’s visual steepness alone. Read each coordinate on the graph’s scales, subtract in a consistent order, and keep the output change over the input change so the sign and units remain meaningful.
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