Answer:
(1, 1), (1, 2), (1, 3), (1, 4), (1, 5)
Step-by-step explanation:
As long as the same x-coordinate appears more than once, the is not a function.
<u>Answer:</u>
<u>Step-by-step explanation:</u>
<u>We can find 'a' through Pythagoras theorem.</u>
Hoped this helped.