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9 cards from this deck
Y = ax + b, where a = gradient, b = y-intercept.
Gradient = (change in y) / (change in x).
An increasing trend; y increases as x increases.
Read where the line crosses the y-axis (x=0).
Choose two clear, distinct points on the line.
Use point and gradient: b = y - ax for a known point.
The rate of change between variables.
Trend line or regression line.
It shows the real-world rate of change.
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