Explanation for Question 18 From the Math (No Calc) Section on the 2017 October Sat
Question 18 says the figure above shows the complete graph of the function 2 F in the X, Y plane. The function G not shown is defined by 3 G of X is equal to F of X plus six. 4 What is the maximum value of the function? 5 G so since we know that the function G is just equal to F 6 of X plus six, all we have to do is find the maximum Y 7 value of F of X, which is this graph here, 8 and then add six to that. So as you can see, 9 the highest Y value is that any of these three points, 10 they're all at the same Y value. And that's at two. 11 So we know that the maximum Y value of F of X is two, 12 and since G of X is equal to F of X plus six, 13 that means that the maximum Y value of G of X is going to 14 be two plus six and two plus six is equal 15 to eight, which means that the maximum of G of X is just eight.