Answer:
square root of 26 (sorry couldn't get the symbol)
Step-by-step explanation:
C^2 = A^2 + B^2 (Pythagoras Theorem)
C^2 = 5^2 + 1^2
C^2 = 26
take square root of both sides
C =

Answer is 74. Greater than 70 less than 80 so some where in the 70s. It has 4 ones so it would be 74.
Both are not functions because functions cannot have repeating x values