To find the value of x for which f(x) equals 8, we need to examine the given function f and determine which x-coordinate corresponds to the y-coordinate of 8.
From the function f = {(5, 2), (2, 6), (8, 5), (6, 8)}, we can see that when x equals 6, the y-coordinate is 8. Therefore, f(6) = 8.
Thus, the value of x that satisfies f(x) = 8 is x = 6