<exercise>
<statement>
<p>Consider the following maps of polynomials <m>S:\mathcal{P}\rightarrow\mathcal{P}</m> and <m>T:\mathcal{P}\rightarrow\mathcal{P}</m> defined by
<xsl:choose>
<xsl:when test="swapped">
<md>
<mrow>S(<xsl:value-of select="f_letter"/>(x))=<xsl:value-of select="nonlinear_trans"/> & & \text{and} & & T(<xsl:value-of select="f_letter"/>(x))=<xsl:value-of select="linear_trans"/>.</mrow>
</md>
</xsl:when>
<xsl:otherwise>
<md>
<mrow>S(<xsl:value-of select="f_letter"/>(x))=<xsl:value-of select="linear_trans"/> & & \text{and} && T(<xsl:value-of select="f_letter"/>(x))=<xsl:value-of select="nonlinear_trans"/>.</mrow>
</md>
</xsl:otherwise>
</xsl:choose>
Explain why one these maps is a linear transformation and why the other map is not.
</p>
</statement>
<answer>
<xsl:choose>
<xsl:when test="swapped">
<p><m>S</m> is not linear and <m>T</m> is linear.</p>
</xsl:when>
<xsl:otherwise>
<p><m>S</m> is linear and <m>T</m> is not linear.</p>
</xsl:otherwise>
</xsl:choose>
</answer>
</exercise>