Answer:
B.(-6,-21)
Step-by-step explanation:
An ordered pair from the function has the form (x, f(x)), so we need to replace x by the first coordinate of the ordered pair and calculate f(x).
So, for option A. (5, -11) we need to replace x by 5 as:
f(x) = - 3x + 4
f(5) = -3(5) + 4
f(5) = - 15 + 4
f(5) = -11
Since f(5) = -11, the ordered pair (5, -11) is an ordered pair of the function:
For option B, we replace x by -6 as:
f(x) = - 3x + 4
f(-6) = -3(-6) + 4
f(-6) = 18 + 4
f(-6) = 22
Since 22 and -21 are distinct, the ordered pair (-6, -21) is not an ordered pair of the function.
Therefore, the correct answer is B.(-6,-21)