The line <em>t</em> is a vertical line. When you reflect something across a vertical line, it retains the same vertical point but not the same horizontal point.
Like, reflecting (-5, 5) across the y-axis(in this case, the y-axis is named <em>t</em>) is: (5, 5).
So now do the same.
<em>Q </em>is 5 units left away from line <em>t</em>. So go 5 units right away from line <em>t. R </em>is 7 units left away from line <em>t</em>. So go 5 units right away from line <em>t</em>. <em>S </em>is 2 units left away from line <em>t. </em>So go 5 units right away from line <em>t. </em>
