Explanation for Question 12 From the Math (Calc) Section on the Official Sat Practice Test 3
Now for number 12, we're told that a function F has five distinct zeros. 2 And so a little bit of vocab for this question, 3 a zero is wherever a graph hits the X axis, 4 right? So if it's saying it should have five zeros, that essentially means it 5 should hit the X axis five times. 6 And so we're just going to go through each graph and count how many 7 times it hits the X axis. Now on a we're at 1, 2, 3, 4, 8 so only four zeros, which isn't enough. 9 We need five looking at BU we have 1, 2, 3, 4, 10 also only four zeros, which is not enough now looking at, 11 see, we've got 1, 2, 3, 4, 5, 6. 12 See, we have six zeros, which is too many, 13 right. And finally, 14 D we've got 1, 2, 3, 4, 5. 15 So there were five times the D hits the, 16 uh, hits the X axis. And that's why D is going to be our 17 best answer.