Explanation for Question 4 From the Math (No Calc) Section on the 2020 October Sat
So question four gives us a graph with a parabola. 2 And the question asks us, according to the graph, 3 which of the following is the value of F of zero. 4 So the first thing that we need to know, right, is that when we 5 talk about graphs, there's X and then there's F of X and F of 6 X is the same thing as the Y value. 7 So if they're asking us for F of zero, 8 they want to know the Y value when X is equal to zero, 9 right? Because the X is turned into zero, 10 but they have F of X. So we want to find the Y when 11 X is zero and X is zero, 12 right about here. If we go down and see what the Y value is, 13 we see that the CR that we crossed the Y axis at negative eight. 14 So the answer to number four is going to be B negative eight.