Question

if f(x) = -x+4, which of the following is not true? The choices are:
a. f(1) < f(0)
b. f(1) > f(-1)
c. f(-1) > f(0)
d. f(0) < f(-1). My prof's answer was letter B. why is it so?

Answer 1

f(x) = -x= 4? Did you type this correctly?

Answer 2

Sorry!
f(x)= -x+4

Answer 3

ok so just plug 1 and -1 in for x:

x = 1...

-(1) + 4 = 3

x = -1...

-(-1) +4 = 5

doesn't look like b. f(1) > f(-1) is right...

Answer 4

since f(1) = 3 and f(-1) = 5

3 > 5 is a false statement.

Answer 5

ahh! I get it! Thank you! Godbless :)

Answer 6

No Problem! :D