Use a line of best fit with a decimal slope
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 = 8.7x + 5. Use it to predict y when x = 6.
Answer: 57.2
A line of best fit for hours of sleep (x) and minutes to fall asleep (y) is y = 5.2x + 6. Use it to predict y when x = 5.
Answer: 32
A line of best fit for temperature (x) and ice creams sold (y) is y = 2.7x + 24. Use it to predict y when x = 4.
Answer: 34.8
Tip: Put the value of x into the equation of the line of best fit.
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