Use a line of best fit to predict
Put the value of x into the equation of the line of best fit.
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A line of best fit for age of a car (x) and its price (y) is y = 4x + 38. Use it to predict y when x = 6.
Answer: 62
A line of best fit for hours studied (x) and test score (y) is y = 7x + 16. Use it to predict y when x = 11.
Answer: 93
A line of best fit for hours studied (x) and test score (y) is y = 3x + 9. Use it to predict y when x = 8.
Answer: 33
Tip: Put the value of x into the equation of the line of best fit.
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