Sat_数学考试试题(17)

Sat 数学历年真题

Depth is on the x-axis. Pressure is on the y-axis.

So Depth is an x-coordinate, and Pressure is a y-coordinate. LABEL x AND y AT

We love zeros and ones (if we don’t, start), so always start there. The first point of (Depth, Pressure), or (x, y), is (0, 14.7). Right off the bat, answers C & E are gone because those lines start at (0, 0) and (?, 0). We’re down to A, B & D.

Look at the remaining answers. A & B both have a negative slope, meaning they slope down from left to right. That indicates that when the Depth number goes higher, the Pressure number goes lower. Is that what the table shows? Not at all! When Depth goes up, Pressure goes up. So A & B are out. We’re left with D as the only possible answer. Take a last look at D, but it’s the only one that works.

D is the correct answer. Test 1 Section 3 Question 13 Sequencing Problem

Let’s write our givens:

First term is 1.

Every term after that is (-2) × (the number before it). Remember this equation.

What are we looking for? The 6 term.

Draw it out. The skeleton looks like this: 1st 2nd 3rd 4th 5th 6th 1 ? ? ? ? ? iv

What’s next? Use the equation in i) above to find the 2 term. (-2) × 1 = -2

So, plugging -2 in we have:

1st 2nd 3rd 4th 5th 6th 1 -2 ? ? ? ? Continue the pattern.

th

nd