Explanation for Question 29 From the Math (Calc) Section on the Official Sat Practice Test 10
Now we're looking at number 29, which gives us this equation right here. 2 And they're asking us, well, what is the meaning of the 1.88? 3 Right? And so we can kind of rewrite this equation as though it was 4 a normal slope intercept form equation. 5 The H is like our, Y we'd have 1.8 X. 6 So L is like our X plus 32.01. 7 So we see immediately that this 1.88 is really our slope, 8 right? So we need to pick an answer choice that involves slope 1.8. 9 And so we know that slope is the change in Y over change in 10 X, right? The rise over the run. And so we know that the slope 11 then has to be describing two variables in relation to each other, 12 not just one variable at a time. Slope is the relationship between these two 13 variables. The rate of change between the two and our Y 14 value, right? 15 Or Y variables replaced by an H, right? 16 And we know that the H is our height. So it's describing 17 the change in height, right? 18 As our L changes as the length changes. 19 And so we see, right, the AA says what the approximate is, 20 or let me try again, a says the approximate femur length of 21 a man with this height, right? 22 And so you see this height here is R R a Y intercept, 23 but this is not describing the change in one, 24 based on the change. In another it's saying that this is a singular femur 25 length, and we know that slope is one value, 26 but it's really a rate of change. So to describe it as a one 27 femur length is not going to work. Now, 28 B says the appro...