Question

Using the graph below, what is the value of f(6) ?

Answer 1

Polynomial mixing with Modulus. First time to see this in my life.

So from the graph it must be even-degree polynomial. It must be 4-degree polynomial judging from the x-intercepts.

There's a fraction/decimal as roots so... Just look from the graph.

When x = 6 or f(6), y = -2 as shown in the graph.

So f(6) = -2