Explanation for Question 12 From the Math (Calc) Section on the 2020 October Sat
So question 12 is asking us what graph shows the function S resuming 2 here function S was 1,280 plus 30 N. 3 So we should note that this is the Y intercept, and this is the 4 slope. Now, if we just look at the Y intercept, 5 we know that we want to graph the intersects, the axis, 6 the Y axis at about 1280. 7 We can see the a and B are close, right? 8 A is just over 1200 and B as also just over 1200. 9 But if we scroll down to, or also D is just over 1200, 10 but if we scroll down to see, we see that starts at zero. 11 So C can't be our answer because it has the wrong Y intercept. 12 Now, if we look at our slope, our slope is a positive number, 13 right? It's positive 30. So we need a positive slope, 14 which looks like an arrow pointing up into the right now a has a 15 positive slope. So it could be good. B actually has a negative slope, 16 right? Because I'm pointing down into the left. 17 So B can't be good. And then D has a horizontal slope. 18 So here, the slope is actually zero, 19 right? Which can't be 30. So the only one that has the correct intercept, 20 Y intercept and slope is going to be a.