Which number is the same distance away for zero as is the number 4

The numbers 4 and -4 are the same distance away from 0 on the number line. The number -63 is less than the number 4. The number -63 is further away from 0 than the number 4 on the number line

answer: 1, 3 and 5 are correct

step-by-step explanation:

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value