Answer Choices
f n n ( ) = − 3
f n n ( ) = 2 − 4
f n n ( ) = 3 − 5
f n n ( ) = 4 − 6
Explanation for Question 4 From the Math (Calc) Section on the Official Sat Practice Test 3
Now a number four where you even a data table. 2 Right? And it looks like our N is similar to our X 3 and our F of N is like our Y values, 4 right? Because anytime you see F of X or something similar like F event, 5 you can assume that's a Y value. And it tells us it's a linear 6 relationship or linear function. 7 And whenever you have a linear function, that always means that you can write 8 the equation of a line to describe it right in the equation of a 9 line. Usually it looks like Y equals MX plus B. 10 Now, if we look at our question, it says, which of the following defines 11 F and all of our answer choices appear similar to the equation of the 12 line, but a little bit different, right? Because again, 13 we're not using X and Y values, we're using an F of N values. 14 So that's why they've written it like F of N instead of Y is 15 equal to M N instead of X plus B. 16 And so you can notice that right off the bat, we're not given a 17 lot of information about the B value, 18 the Y intercept value. We should know that that would happen when N or 19 when X is equal to zero, right? 20 That always happens. You always have a Y intercept when X is zero, 21 but we don't see a zero value up here. 22 So it would take a little bit more work to find the Y intercept. 23 And we should start by finding the slope. And that's actually all that we're 24 going to need to look at. We don't need the y-intercept because we look 25 at our answer choices, but each have a different slope, 26 r...