Final answer:
To evaluate the function f(x) = 1 - 7x for x = -7, substitute -7 into the function to get f (-7) = 50.
Step-by-step explanation:
To evaluate the function f(x) = 1 - 7x for x = -7, we simply substitute -7 into the function:
f (-7) = 1 - 7(-7)
= 1 + 49
= 50
Therefore, f (-7) = 50.