Question

If f(x) 0.5(1 - x), what is the value of f(-1)?

0

0.5

2.5

1

Answer 1

f(x) = 0.5(1 - x)

Replace every instance of "x" with -1:

f(-1) = 0.5(1 - [-1])
= .5 + 2 = 1.5 or 3/2 (answer)

Answer 2

f(x) = 0.5×(1 - x)
f(-1) = 0.5×(1 - (-1)) = 0.5×(1 + 1)
f(-1) = 0.5×2 = 1

The appropriate choice is f(-1) = 1.