Explanation for Question 52 From the Reading Section on the 2018 May Sat
Question number 52 astronomers estimate that the sun formed about 8.5 billion 2 years after the big bang. According to the figure, 3 what was the star formation rate at the time the sun formed? 4 So we're looking for star formation rate at the year 8.5 billion. 5 So star formation rate we see is measured 6 here on this vertical axis. 7 So we're going to be looking at this scale here. 8 And remember, we're looking for 8.5 billion years since 9 the big bang, which is going to be here. 10 So we want to see where are we on the vertical axis at 8.5. 11 We're going to follow that up to our line here. 12 And we see that we are about 3.54, 13 um, on our vertical axis. 14 So about three and a half to four stars formed per year. 15 Looking at our answer choices. The closest choice is see 16 about four. So that's our best answer for question number 52.