Question

Help: is y=x-3 (x-3 is in absolute value brackets) a function? How do I know?

Answer 1

It is a function.
f(x) = ㅣxㅣ is a parent graph, which is the V-shaped graph.
if the number is added or subtracted inside the ABV, then the graph is either going to move to the right or to the left.
in this case, you move the graph 3 to the right. \
and when you graph it, it is going to pass the vertical line test so it is a function.

Answer 2

and you plug in numbers if you want to graph the function.