Select a student to display the completed scatter plot. Ask students:

• "How is the scatter plot for this data like the scatter plot for the absolute guessing errors from an earlier lesson?" (The points still form a V shape. There are still no negative $y$-values.)
• "How are they different?" (The graphs are shifted horizontally toward the vertical axis. The two parts of the V now meet at $(0,0)$.)

To help students see that the "actual average temperature" is like the "actual number of items in a jar" they saw earlier, highlight that:

• Earlier, we saw that when the actual number of items is $a$, the absolute guessing error is "the distance of guess from $a$," which can be expressed as "the absolute value of (guess - $a$)," or $|\text{guess} - a|$. 
• Here, likewise, when the actual average temperature is $a$ and the guess is $x$, the absolute guessing error, $y$, is "the distance of $x$ from $a$," which can be written as $y = |x-a|$.
• When the actual temperature in Toronto is 0 degrees Celsius, $y$ is "the distance of $x$ from 0," which can be written as $y=|x-0|$, or simply $y=|x|$.