DS MathLesson 9Free preview

DS Linear Functions

This lesson is part of Data Science · All levels

Summary

A linear function has a general form y = mx + c whose graph is a straight line. Here m is the slope that shows the change magnitude of y for every addition of one unit x, whereas c is the cutting point on the y-axis. Because it changes constantly, linear functions are suitable for data with a constant change trend.

Key points

Common form: y = mx + c (m = slope, c = intercept).
Slope remains along the line: Îy per one Îx.
M positive: the line up; m negative: the line down.
M = 0 gives a horizontal line (y constant).
Suitable for the relationship of two variables with constant change.

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