What the intercept of a line of best fit means
The y-intercept is the predicted y when x is 0.
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A line of best fit for temperature (x) and ice creams sold (y) is y = 4x + 29. What y does the line predict when x = 0?
Answer: 29
A line of best fit for hours of sleep (x) and minutes to fall asleep (y) is y = 7x + 28. What y does the line predict when x = 0?
Answer: 28
A line of best fit for shoe size (x) and height (y) is y = 3x + 48. What y does the line predict when x = 0?
Answer: 48
Tip: The y-intercept is the predicted y when x is 0.
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