Question

A function has the ordered pairs​ (1,3), (7,4),​ (8,6), and​ (9,y). What restrictions are there on the value of y so that the inverse of the function is also a​ function? Explain.

Answer 1

y cannot be 3, 4, or 6

Explanation:

If the function is to have an inverse, the y-values cannot be repeated. This means ...

y ∉ {3, 4, 6}