Andy would have to make 3 trips in order to cycle 21 kilometers.
Average rate of change is (f(8) - f(-6))/(8 - (-6)) = ((<span>|8 + 3| -1) - (</span><span>|-6 + 3| -1))/(8 + 6) = ((</span><span>|11| -1) - (</span><span>|-3| -1))/14 = ((11 - 1) - (3 - 1))/14 = (10 - 2)/14 = 8/14 = 4/7</span>
I think b is y would 15 and x is 3 making 15=3•5 or 15•3=45
6.34 rounds to 6.
3.95 rounds to 4.
So 6+4=10