medium · SAT Math
A biology class recorded the height of a sunflower seedling, in centimeters, on several days after it was planted. The recorded data and the line of best fit are given below. Day after planting (x): 2 5 8 12 15 Height, in cm (y): 12 20 30 38 46 Line of best fit: y = 2.5x + 8, where x is the number of days after planting and y is the predicted height of the seedling, in centimeters. What is the residual for the data point recorded on day 8?
- -2 cm
- 2 cm
- 28 cm
- 30 cm
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