<p>basically the x axis was 24,25,26,27,28 or something like that.
you gotta remember that theres a yaxis that goes by tens.</p>
<p>so just find the median. idk the exact question but say the y value for the 24 was 40 and same goes for the y value of 28. you cancel those two out and it leaves u with 25,26,27.</p>
<p>you just had to keep doing that and it ended up that all of 24,25,27,28 was cancelled otu and there was like 20 or 10 left of 26. so the answers 26</p>
<p>@Cuthalion, if you looked at the graph and saw that when the temperature was -55, the altitude was 10 (I think, might have been another number), and plugged it into the equation, -7x+13 gave the closest value. There was also another number for the temperature around -20 or something but I forgot.</p>