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<h3>Cool Down (5 minutes)</h3>
<h4>Student Activity</h4>
<p>Each of these graphs of residuals is from the same set of data using different lines to fit the data.
Which graph is most likely to represent the residuals from a line of best fit? Be prepared to show your
reasoning.</p>
<div class="os-raise-d-flex os-raise-justify-content-evenly">
<p>Graph A<br><img alt="Graph of residuals, origin O." height="208"
src="https://k12.openstax.org/contents/raise/resources/51c73a9fda2fbdbcb41a323a4392cdf78f0b5e58" width="190">
</p>
<p>Graph B<br><img alt="Graph of residuals, origin O." height="208"
src="https://k12.openstax.org/contents/raise/resources/b180a0f640c1a1fe9cf4265fcbe68c26f9613b33" width="190">
</p>
<p>Graph C<br><img alt="Graph of residuals, origin O." height="208"
src="https://k12.openstax.org/contents/raise/resources/a11d22edae507f7e59f2e75a9bd4650fc903a9ce" width="190">
</p>
<p>Graph D<br><img alt="Graph of residuals, origin O." height="208"
src="https://k12.openstax.org/contents/raise/resources/6413df0124f8e7464eb418a28a133b866228e7b9" width="190">
</p>
</div>
<p><strong>Answer:</strong></p>
<p>Graph A is most likely to represent the residuals from the best fit line. The residuals seem well
spaced on either side of the \(x\)-axis without an obvious pattern, and all of the residuals are close to
0.</p>
<h4>Response to Student Thinking</h4>
<h5>Points to Emphasize</h5>
<p>If students struggle here, select sample student work to discuss and assign practice problems to revisit this
topic. Residuals will not be discussed again in this unit.</p>