One to one function

Question

Answer 1

A one-to-one function, f(x), has a different value of f(x) for every value of x.

A graph of a one-to-one function is said to pass the horizontal line test:

Any horizontal line drawn on the graph will not intersect the graph of the function more than one time.

Look at the graph of y = –7|x|. Does it pass or fail the horizontal line test?

If it passes, then you have a one-to-one function.

If it fails, then you do not have a one-to-one function.

Hope this helps. Add a comment if you have any questions.