Answer:
2nd answer : it is NOT a function, because some (actually all) input value are associated with more than one output value.
Step-by-step explanation:
the "input values" are the x-values. when we go along the x-axis, are there any values of x that have more than 1 y-value ?
yes, it starts with x = -5.
before that there are no defined y-values.
starting with x = -5 up to x = 6 there are at least 2 associated y-values (y = 9 and y = 3) for any possible value of x.
for x exactly -5 and 6 there are in fact infinitely many y-values associated (the lines between y = 3 and y = 9).
but a relation is only then a function, if every defined value of x has exactly one associated y-value.
