Question

francisco has a part - time job at an ice skating rink selling hot cocoa. he decided to plot the number of hot cocoas he sold relative to the day’s high temperature and then draw the line of best fit. calculate the residual for the data point that corresponds to 116 hot cocoas sold and a high temperature of 2°f.

Explanation:

Step1: Identify observed value

The observed number of hot cocoas sold (when temperature is $2^\circ\text{F}$) is $y_{\text{observed}} = 116$.

Step2: Identify predicted value

From the line of best fit, at $x=2$, the predicted value is $y_{\text{predicted}} = 115$.

Step3: Calculate residual

Residual = Observed value - Predicted value
$\text{Residual} = 116 - 115$

Answer:

$1$