Explanation for Question 5 From the Math (Calc) Section on the Official Sat Practice Test 1
So number five is asking us to pick the graph that shows a strong 2 negative correlation. So our key words here are strong and negative. 3 We can start by looking at correlations that are negative for negative. 4 We would expect it to move down into the right, like a negative slope 5 and for positive, we would expect the trend of the, 6 of the general points to go kind of up into the right. 7 Right. So just like slope, the direction of the correlation is exactly like slope. 8 Now a we see that they generally move down into the right. 9 So that would be negative B. 10 We see that it's kind of maybe curved up a little bit. 11 Perhaps we can even think about it as being a straight horizontal line. 12 So B is not necessarily that good of a negative correlation. 13 So we can't choose answer choice B C we see, 14 they move up into the right. This is indicative indicative of a positive correlation. 15 So C is not our best answer choice because it's not negative. 16 Finally, D is also balanced with the right. 17 So both a and D are negative. We just have to choose the one 18 that has the stronger correlation and the stronger correlation will have points that are 19 more closely packed together. We see that the points are further apart in 20 a, than they are in D and D they're really close together. 21 So D has a stronger negative correlation and will be our best answer.