Explanation for Question 37 From the Math (Calc) Section on the 2020 March Sat
Now in 37, it says that based on the line of best fit in 2 this graph right here, the estimated value of a six-year-old computer is K thousand 3 dollars for Kazan integer. What is K? 4 So essentially they're asking us to use the line of best fit to figure 5 out how much a six year old computer would cost. 6 So let's look at this graph, right? And if we look here at our 7 X axis, that's where we see the age of the computer and we're looking 8 at a six year old computer. So we're looking here and now we need 9 to go up to the line of best fit, which is right here. 10 Right? So there's three points at six, 11 but there's also the line. And we know that we need to really be 12 focusing on what the line says. And when we find that point, 13 we go off to the side, we see that says 15 thousands of dollars, 14 right? So really a six-year-old computer is going to cost $15,000, 15 get rid of one of those zeros. But what we are looking at here 16 is K thousand dollars, right? Where K's an integer. 17 So it's K thousand essentially. 18 And in this case is we have 15,000 RK has to be 15, 19 right? Because that K is going to be 15, 20 becomes $15,000, which is what we got from the graph.