You did the top right but the denominator is 0 so the slope in undefined or 0.
Hope this helps!
No. they change because you are changing the size of the shape
the answer would be E because if you round answer E to 3mph and divide by 2 you get 1.5 and a hour is 60 minutes divide that by 2 and you get 30 minutes however you walked slightly slower so it would take 5 minutes longer.
Negative ions are oxygen atoms charged with an extra electron. They are created in nature by the effects of water, air, sunlight and the Earth’s inherent radiation. We dont really create them in the human body.