Explanation for Question 1 From the Math (No Calc) Section on the 2020 March Sat
So let's take a look at number one. Number one gives us a table 2 of data values right here. Then ask us, 3 asks us, which of the following equations shows a possible relationship between X 4 and Y. And so here, they've worded it a little bit more complicated 5 as an sat question normally does where they've said the possible relationship between 6 X and Y. But if we look at our answer choices, 7 we know that all they're really asking for is the equation of the line. 8 So what we need to do is take this information right here in the 9 table and convert this into an equation. 10 And we can do that using slope intercept form, 11 right where the equation has an M, which is our slope and a B, 12 which is our Y intercept. So we need to figure out what these two 13 things are in order to choose the right answer. 14 And the easiest one is always to start with the Y intercept. 15 And the way that we can do this is by looking at the value 16 where X is equal to zero. Because if we think about what 17 the Y intercept is, right, it's always along this axis right here. 18 And no matter how high or how low you are on this axis, 19 your X value is always zero. 20 So we're X is equal to zero. You have your Y intercept. 21 And that happens right here where Y is equal to two. 22 So that means our Y intercept is equal to two. 23 And so we're left immediately with a being our best answer just by looking 24 at the Y intercept, we can choose a and move on, but to double 25 check, we can also look ...