Is the Official Guide 2nd Ed. wrong or am I going insane from studying

Test Preparation SAT Preparation
1

<p>test # 1 section #3 problem #12</p>

<p>The cahrt above shows the pressure as a function of the depth for every 15 feet of descent into the ocean. If the pressure increases at a constant rate for every foot of descent which of the following graphs describes the given data.
Data</p>

<p>Depth (ft) Pressure (psi)
0 14.7<br>
15 21.375
30 28.05<br>
45 34.725 </p>

<p>I chose (D)
the graph has an upward trend with a y intercept greater than 0 </p>

<p>the book lists the correct answer as C
the graph also has an upward trend but intersects the axes at (0,0)</p>

<p>the book is wrong right? the data clearly shows that y=14.7 when x=0 so the point (0,0) cannot exist on the graph…</p>

2

<p>Yeah, looks like a mistake on the book’s part. Tsktsk…</p>

<p>(unless it was relative to atmospheric pressure, but that wouldn’t be tested on the math section)</p>

3

<p>yeah, the correct answer is D</p>