Evaluate the function.

Find f(-1) when f(x) = x2 - 2x - 7

A.-8

B.-4

C.6

D.10

f(x) = x² - 2x - 7

f(-1), this means that x = -1.

Since you need to find f(-1), substitute/plug in -1 into "x" in the function:

f(x) = x² - 2x - 7       Plug in -1 into "x"

f(-1) = (-1)² - 2(-1) - 7

f(-1) = 1 + 2 - 7

f(-1) = -4          Your answer is B

have a common denominator and see which numerator is larger

if you have 1/5 and 1/8, you make a common denominator:

40

8/40>5/40

1/5 is larger