<p>NEED HELP WITH THE FOLLOWING QUESTIONS:</p>
<p>they are graphs ...so</p>
<p>BB (Official SAT guide), Pg 400...q-18 why is the answer D...coz II can be correct too..isnt it?</p>
<p>and pg 427 q-17 why is the answer E?</p>
<p>Q-18; No, (a,b) lies in the shaded region, not on the line.</p>
<p>Q-15 (I assume, since there is no Q-17); Since the length of the line is 6, the two points that the parabolas intersect on are (3,9) and (-3,9) because those points are 6 units apart. Now you have a formula, (y=a-x^2) and a point (3,9). Simply plug it in and solve for a.</p>